The time and effort he has devoted during the past few years ______ trees in that remote area is now considered to be of great value.
| A．plant | B．planting | C．to plant | D．to planting |
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 |
-Could I use your cell-phone to make a call, Jake?
-Sorry. It __________ in the office.
| A．is charging |
| B．has charged |
| C．is being charged |
| D．has been charged |
__________ David says sounds right to Helen. That's why she has made up her mind to leave him __________ happens.
| A．Whatever; whatever |
| B．No matter what; whatever |
| C．No matter what; no matter what |
| D．Whatever; however |
__________ tired I am, I will try my best to finish the important task.
| A．No matter what |
| B．No matter how |
| C．No matter when |
| D．No matter where |
What _______ pity that you must leave now! It is such _______ great fun to have dinner with you.
| A．a; a |
| B．a; the |
| C．/; a |
| D．a; / |