I___________ frustrated when I wasn’t sure of the correct answer.
| A．may be | B．used to |
| C．used to be | D．use to be |
相关试题
Our country ______the sixth population census(人口普查) already.
| A．finished | B．has finished | C．will finish | D．finishes |
— Many people eat_____ meat than they did before.
—Yes, that’s why they’re getting fatter and fatter.
| A．more | B．less | C．fewer | D．much |
The environment in our town is get
ting worse and worse,so many trees____.
| A．are planting | B．should be planted | C．should plant | D．will plant |
Do you know ______in Japan?
| A．when nuclear(核) accidents happened | B．when did nuclear accidents happen |
| C．when nuclear accidents happen | D．when do nuclear accidents happen |
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