Copying and pasting data using VBA code

I have a button on a spreadsheet that, when pressed, should allow the user to open a file, then copy columns A-G of the spreadsheet "Data", then paste the data from those columns on the current sheet.

I have a logic error in the code; it runs, but it pastes the selection in the wrong place.

I am having trouble referencing the two workbooks.

Here is my code:

Sub Button1_Click()
    Dim excel As excel.Application
    Dim wb As excel.Workbook
    Dim sht As excel.Worksheet
    Dim f As Object

    Set f = Application.FileDialog(3)
    f.AllowMultiSelect = False
    f.Show

    Set excel = CreateObject("excel.Application")
    Set wb = excel.Workbooks.Open(f.SelectedItems(1))
    Set sht = wb.Worksheets("Data")

    sht.Activate
    sht.Columns("A:G").Select
    Selection.Copy
    Range("A1").Select
    ActiveSheet.Paste

    wb.Close
End Sub