With everyone’s face_________behind the mask, it’s hard to tell who they really are.
| A．having hidden | B．being hidden | C．hidden | D．hiding |
－He asked Tom, “Have you finished your homework？”
－He asked Tom .
| A．if had he finished his homework. |
| B．whether he had finished his homework |
| C．if he had finished your homework. |
| D．if you had finished your homework. |
The reason being late for the meeting was his little son fell in this morning.
| A．for; that | B．why; that | C．for; because | D．why; because |
At the age of eight, he ___a group of child dancers.
| A．joined in | B．attended | C．took part in | D．joined |
_______ miss the train, he got up very early this morning.
| A．In order to not | B．So as to not | C．In order not to | D．So as not to |
Do you know the trouble I have _____ the work?
| A．to do | B．doing | C．do | D．done |