Compare columns in 2 sheets in the same workbook and copy HELP NEEDED

Hello,

What i want to to do is the following:
I have a spreadsheet1 that has lets say the following values:
A B C D
1 10 beer 2435 2,5
2 11 bread 2674 3,4
3 12 Pepsi 2437 1,2
4 13 cheese 2546 3,7
5 14....
The other spreadsheet has some values (row1) from the sheet1 and description only (row2):
A B
1 11 bread
2 13 cheese
e.c.t.

What i want is to copy from sheet1 to sheet2 all the rest info to the common numbers from the first row

Thank you in advance
Kostas