1. I didn't call you last night because I ____ (know) you were busy.
A.
B.
C.
2. You ____ (mow) your lawn this morning, didn't you?
A.
B.
C.
3. It was Gina who ____ (blow up) all the balloons.
A.
B.
C.
D.
4. My first car was good, but its insurance ____ (cost) so much.
A.
B.
C.
5. A decision has been ____ (take) by the patient.
A.
B.
C.
6. In 1980 He ____ (become) an American citizen.
A.
B.
7. Who ____ (wake up) in the morning at 4 o'clock?
A.
B.
C.
8. She had ____ (leave) when I came.
A.
B.
C.
9. I ____ (see) you walking down the hill yesterday morning.
A.
B.
C.
10. I think I ____ (overbuy) fruits. Do you want some apples?
A.
B.
C.