The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.
| A．to be based on | B．to base on | C．which to base on | D．on which to base |
I found the homework was not so heavy as __________ I __________ to get in my old school.
| A．that; was used |
| B．what; used |
| C．which; used |
| D．that; used |
We all felt the plan __________.
| A．difficult to be carried out |
| B．difficultly to carry out |
| C．difficult to carry out |
| D．difficulty to be carried out |
-Did you hear someone talking in the living room?
-Oh, I forgot to __________ the TV just now.
| A．switch on |
| B．turn on |
| C．switch over |
| D．switch off |
The parents left their eldest son Daniel __________ of their house while they were away.
| A．in the charge |
| B．in charge |
| C．in his charge |
| D．in a charge |
The man __________ charge said everybody could get a copy __________ free, which pleased us all.
| A．in; for |
| B．of; for |
| C．in; with |
| D．of; with |