2. We are _______ some experiments

a.making b.learning c.doing d.studying

3.My brother is good ______ English

a.at b.in c.with d.for

1) for
2) at
3) how
4)making
5) at
6)age
7)at
8)the most
9)go
10)idea
11)Why
12)playing

đây nha 
1). It’s time..... recess ( on/ to/ for/ with)
2). He is a student...... le Loi school ( at /in/ on/ to)
3). Mai learns...... to use computer ( what/ when/ how/ why)
4). We are...... some experiments ( making/ learning/ doing/ listening)
5). My brother is good...... English ( at/ in/ with/ for)
6). Tim And Hoa are the same....... ( years old/ date/ age)
7). Does nam often play marbles...... recess ?( on/ at/ in/ for)
8). Talking is...... common way of relaxing ( more/ most/ the most/ much more) 
9). Children should....... to bed early ( to go/ go/ going/ goes)
10. That’s a good...... ! Let’s go to the beach ( thinking/ answer/ idea/ asking)
11). ........ don’t you come to my house?  (Why/ let’s/ what/ how)
12). Tam enjoys....... soccer ( playing/ to Phay/ play/ plays)