diff --git a/Table.xls b/Table.xls
new file mode 100644
index 0000000..963d872
Binary files /dev/null and b/Table.xls differ
diff --git a/col.go b/col.go
index a092659..7717529 100644
--- a/col.go
+++ b/col.go
@@ -46,7 +46,7 @@ func (xf *XfRk) String(wb *WorkBook) string {
 	switch wb.Xfs[21].formatNo() {
 	case 27:
 		if f, e := xf.Rk.Float(); e == nil {
-			t := TimeFromExcelTime(f, true)
+			t := timeFromExcelTime(f, true)
 			return t.Format("2006.01") //TODO it should be international
 		}
 	}
diff --git a/date.go b/date.go
index 6c0ef1a..b7d2d04 100644
--- a/date.go
+++ b/date.go
@@ -69,7 +69,7 @@ func doTheFliegelAndVanFlandernAlgorithm(jd int) (day, month, year int) {
 }
 
 // Convert an excelTime representation (stored as a floating point number) to a time.Time.
-func TimeFromExcelTime(excelTime float64, date1904 bool) time.Time {
+func timeFromExcelTime(excelTime float64, date1904 bool) time.Time {
 	var date time.Time
 	var intPart int64 = int64(excelTime)
 	// Excel uses Julian dates prior to March 1st 1900, and
diff --git a/workbook.go b/workbook.go
index f56e596..0abd21f 100644
--- a/workbook.go
+++ b/workbook.go
@@ -10,13 +10,14 @@ import (
 
 //xls workbook type
 type WorkBook struct {
-	Is5ver         bool
-	Type           uint16
-	Codepage       uint16
-	Xfs            []st_xf_data
-	Fonts          []Font
-	Formats        map[uint16]*Format
-	Sheets         []*WorkSheet
+	Is5ver   bool
+	Type     uint16
+	Codepage uint16
+	Xfs      []st_xf_data
+	Fonts    []Font
+	Formats  map[uint16]*Format
+	//All the sheets from the workbook
+	sheets         []*WorkSheet
 	Author         string
 	rs             io.ReadSeeker
 	sst            []string
@@ -29,7 +30,7 @@ func newWorkBookFromOle2(rs io.ReadSeeker) *WorkBook {
 	wb.Formats = make(map[uint16]*Format)
 	// wb.bts = bts
 	wb.rs = rs
-	wb.Sheets = make([]*WorkSheet, 0)
+	wb.sheets = make([]*WorkSheet, 0)
 	wb.Parse(rs)
 	return wb
 }
@@ -199,22 +200,32 @@ func (w *WorkBook) get_string_from_bytes(bts []byte, size uint16) string {
 
 func (w *WorkBook) addSheet(sheet *boundsheet, buf io.ReadSeeker) {
 	name := w.get_string(buf, uint16(sheet.Name))
-	w.Sheets = append(w.Sheets, &WorkSheet{bs: sheet, Name: name, wb: w})
+	w.sheets = append(w.sheets, &WorkSheet{bs: sheet, Name: name, wb: w})
 }
 
 //reading a sheet from the compress file to memory, you should call this before you try to get anything from sheet
-func (w *WorkBook) PrepareSheet(sheet *WorkSheet) {
+func (w *WorkBook) prepareSheet(sheet *WorkSheet) {
 	w.rs.Seek(int64(sheet.bs.Filepos), 0)
 	sheet.parse(w.rs)
 }
 
+func (w *WorkBook) GetSheet(num int) *WorkSheet {
+	if num < len(w.sheets) {
+		s := w.sheets[num]
+		w.prepareSheet(s)
+		return s
+	} else {
+		return nil
+	}
+}
+
 //helper function to read all cells from file
 func (w *WorkBook) ReadAllCells(max int) (res [][]string) {
 	res = make([][]string, 0)
-	for _, sheet := range w.Sheets {
+	for _, sheet := range w.sheets {
 		if len(res) < max {
 			max = max - len(res)
-			w.PrepareSheet(sheet)
+			w.prepareSheet(sheet)
 			if sheet.MaxRow != 0 {
 				leng := int(sheet.MaxRow) + 1
 				if max < leng {
diff --git a/worksheet.go b/worksheet.go
index 8a661af..1d530b1 100644
--- a/worksheet.go
+++ b/worksheet.go
@@ -17,10 +17,11 @@ type boundsheet struct {
 
 //WorkSheet in one WorkBook
 type WorkSheet struct {
-	bs     *boundsheet
-	wb     *WorkBook
-	Name   string
-	Rows   map[uint16]*Row
+	bs   *boundsheet
+	wb   *WorkBook
+	Name string
+	Rows map[uint16]*Row
+	//NOTICE: this is the max row number of the sheet, so it should be count -1
 	MaxRow uint16
 }
 
diff --git a/xls.go b/xls.go
index 1a54d58..2c93292 100644
--- a/xls.go
+++ b/xls.go
@@ -47,7 +47,6 @@ func parse(bts []byte, charset string) (wb *WorkBook, err error) {
 				return
 			}
 		}
-
 	}
 	return
 }
diff --git a/xls_test.go b/xls_test.go
new file mode 100644
index 0000000..7391115
--- /dev/null
+++ b/xls_test.go
@@ -0,0 +1,67 @@
+package xls
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"testing"
+)
+
+func TestOpen(t *testing.T) {
+	xlFile, _ := Open("Table.xls", "")
+	sheet1 := xlFile.GetSheet(0)
+	fmt.Println(sheet1.Name)
+	fmt.Print(sheet1.Rows)
+	for k, row1 := range sheet1.Rows {
+		// row1 := sheet1.Rows[1]
+		fmt.Printf("\n[%d]", k)
+		for _, col1 := range row1.Cols {
+			// col1 := row1.Cols[0]
+			fmt.Print(col1.LastCol())
+			fmt.Print(" ")
+		}
+	}
+}
+
+func TestBof(t *testing.T) {
+	b := new(bof)
+	b.Id = 0x41E
+	b.Size = 55
+	buf := bytes.NewReader([]byte{0x07, 0x00, 0x19, 0x00, 0x01, 0x22, 0x00, 0xE5, 0xFF, 0x22, 0x00, 0x23, 0x00, 0x2C, 0x00, 0x23, 0x00, 0x23, 0x00, 0x30, 0x00, 0x2E, 0x00, 0x30, 0x00, 0x30, 0x00, 0x3B, 0x00, 0x22, 0x00, 0xE5, 0xFF, 0x22, 0x00, 0x5C, 0x00, 0x2D, 0x00, 0x23, 0x00, 0x2C, 0x20, 0x00})
+	new(WorkBook).parseBof(buf, b, b, 0)
+}
+
+func TestMaxRow(t *testing.T) {
+	xlFile, err := Open("Table.xls", "utf-8")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failure: %v\n", err)
+		t.Error(err)
+	}
+
+	if sheet1 := xlFile.GetSheet(0); sheet1 != nil {
+		if sheet1.MaxRow != 11 {
+			t.Errorf("max row is error,is %d instead of 11", sheet1.MaxRow)
+		}
+	}
+}
+
+//read the content of first two cols in each row
+func ExampleReadXls(t *testing.T) {
+	xlFile, err := Open("Table.xls", "utf-8")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Failure: %v\n", err)
+		t.Error(err)
+	}
+
+	if sheet1 := xlFile.GetSheet(0); sheet1 != nil {
+		fmt.Print("Total Lines ", sheet1.MaxRow, sheet1.Name)
+		col1 := sheet1.Rows[0].Cols[0]
+		col2 := sheet1.Rows[0].Cols[0]
+		for i := 0; i <= (int(sheet1.MaxRow)); i++ {
+			row1 := sheet1.Rows[uint16(i)]
+			col1 = row1.Cols[0]
+			col2 = row1.Cols[1]
+			fmt.Print("\n", col1.String(xlFile), ",", col2.String(xlFile))
+		}
+	}
+}