We the work on time without your help.
| A．hadn’t had finished |
| B．didn’t have finished |
| C．couldn’t have finished |
| D．can’t have finished |
He left home early only______he was late as he went a wrong way.
| A．found | B．to find | C．finding | D．being found |
— Beijing or Shanghai? What did you mean?
— We were talking about _______ go to college.
| A．how to | B．where to | C．whether to | D．when to |
When he was a boy, he used to go there and watched _______.
| A．repairing bicycles | B．to repair bicycles |
| C．bicycles being repaired | D．bicycles to be repaired |
Robert is said______ abroad, but I do not know what country he studied in.
| A．to have studied | B．to study | C．to be studying | D．to have been studying |
Beijing was attacked by such a terrible sandstorm ______few citizens had ever experienced before.
| A．and it was | B．as | C．that | D．which |