1. C
2. B
3. A
4. D
5. A
6. B
6) B.
7) B.
8) C.
9) B.
10) A.
11) C.
12) B.
1) The students are very poor and he get the scholarship.
2) She ate a banana but it still green
3) Although the traffic was terrible, our teacher didn't arrive late.
4) There will be big floods every year,If you cut down the trees in the forests.
5) Therefore she has to do the test again, Hoa failed her math test