My suggestion is that the experiment ______ in another way.
A: is done
B: will be done
C: has been done
D: be done
A: is done
B: will be done
C: has been done
D: be done
举一反三
- Only recently_________ to deal with the environmental problems. A: something has done B: has something done C: has something been done D: something has been done
- The work_______by the time you get there. A: has been done B: had been done C: will have been done D: will be done
- Only in the past few years _______ to improve the living conditions in this area. A: something has been done B: there is something done C: has there something been done D: has something been done
- Only in the last few years ______ to improve the conditions of the blighted (荒芜的) areas in Hong Kong. A: anything has been done B: there is anything done C: has there anything been done D: has anything been done
- The homework when they left. A: did B: had done C: had been done D: has done