By the time he _____ back last night, we had got 200 pictures of the Chang'e-3 lunar probe.
| A．came | B．had come | C．was coming | D．would come |
He is a kind-hearted boy and he will come to the Old Folks' Home whenever __________.
| A．he is convenient | B．he will be convenient |
| C．it is convenient to him | D．it will be convenient to him |
I can think of many cases______ the media have a strong effect on young men.
| A．why | B．where | C．as | D．which |
–It is said that Bob will drop out of school because his family cannot afford the school fee.
– _____, let’s give him a hand.
| A．If so | B．If only | C．Where necessary | D．Where possible |
Despite their______of interest, Fleming kept trying to develop chemical______ it would be safe and effective.
| A．lack, so as to | B．lacking, so as to |
| C．lack, so that | D．lacking, so that |
. After recovering from her illness, she was advised to ______ gardening as a hobby.
| A．take away | B．take off | C．take on | D．take up |