1. If you want to pass the exam, you'd better ..... some studying.
A) do B) to do C) doing D) done

2. If I knew the answer, I ..... you.
A) will tell B) tell C) would tell D) had told

3. I will send you an e-mail when I ..... back in my country.
A) will be B) am C) have been D) should be

4. By the time we arrived at the station, our train ..... .
A) left B) had left C) had been leaving D) was left

5. It was ..... film that we left before the end.
A) such a boring B) so boring C) the most boring D) a so boring

6. Would you mind ..... the window? It's very hot in there.
A) open B) openign C) to open D) opened

7. David's mother made him ..... his bedroom.
A) to clean B) cleaning C) clean D) cleaned