It is a long time since she last saw her best friend.
A.She didn’t saw her best friend for a long time.
B.
C.The last time she had seen her best friend was a long time.
D.

I had no sooner closed the door than somebody knocked.
A.
B.Scarcely had I closed the door than somebody knocked.
C.
D.I had closed the door right after somebody knocked.

I had hardly got up when it rained heavily.
A.When I had got up, it rained heavily.
B.No sooner I had got up than it rained heavily.
C.Hardly had I got up when it rained heavily.
D.I had no sooner got up when it rained heavily.

Hardly had I finished the meal when I started feeling hungry again.
A.No sooner had I finished the meal than I started feeling hungry again.
B.No sooner I had finished the meal than I started feeling hungry again.
C.I had no sooner finished the meal then I started feeling hungry again.
D.Scarcely I had finished the meal when I started feeling hungry again.

I did all my homework, and then I went out with my friends.
A.Before I did all my homework, I had gone out with my friends.
B.Before I went out with my friends, I had done all my homework.
C.I had gone out with my friends just after I did all my homework.
D.After I did all my homework, I went out with my friends.

When did you use the computer?
A.How long have you used the computer?
B.How long is it since you last used the computer?
C.
D.How long did you use the computer?

It is over six months since I last played basketball.
A.I have started playing basketball for over six months.
B.I haven’t played basketball for over six months.
C.The last time I played basketball was over six months.
D.I last played basketball was over six months ago.

How long is it since he last taught primary students?
A.When did he last teach primary students?
B.When did he teach primary students?
C.How long has he taught primary students?
D.How many times has he taught primary students?

This is the first time he went abroad.
A.He has gone abroad for the first time.
B.He has gone abroad before.
C.He hasn’t gone abroad before.
D.The first time he went abroad was this time.

When did you first know him?
A.
B.How long did you know him?
C.
D.How long did you know him for the first time?