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 |
相关试题
The boy student is poor in health now; his parents wish that his health _____when he grows up
| A．can improve | B．could improve |
| C．can be improved | D．could be improving |
Don’t enter the office unless _______.
| A．you have told to | B．told to | C．telling | D．you are told |
Can you find a sentence situation _______ this phrase can be used?
A. where B
. when C. which D. that
Trust him please! When he _______ reading it, he will return the book to you on time.
| A．finish | B．will finish | C．has finished | D．finished |
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