The engineers are so busy that they have zero time for outdoor sports activities, _____they have the interest.
| A．wherever | B．whenever | C．even if | D．as if |
Deaf people use sign language to ___.
| A．communicate | B．communicates | C．communicating | D．communicated |
This little girl can speak many ___.
| A．language | B．languages | C．sentence | D．word |
He told his friends that he ___ what he was reading at the same time the day before.
| A．was just asked | B．just asked | C．had just asked | D．had just been asked |
They ___ every means, but the engine __ work.
| A．tried; couldn't | B．have tried; won't | C．tried; won't | D．have tried; can’t |
The workers ___ busily when the boss came to look for something she ___ in the office.
| A．had worked; had left | B．were working; had left | C．working; had left | D．had worked; left |