25．When I got to his office, I____ that he ____ out.

A．told; had been

B．was told; was

C．had told; was

D．was told; had been

24．He knows little about the city as if he ____there so far.

A．isn't

B．weren't

C．shouldn't have been

D．hadn't been

23．----We didn't see him at the lecture.

----Neither did anyone else. He ____it.

A．may not have attended

B．must have been absent

C．can't have attended

D．couldn't have been present

22．Mary has just left, but I did not know she ____ until yesterday evening.

A．will leave

B．was leaving

C．had left

D．has left