—We’redoingalottoprotectourenvironment(环境),butitisnotgo...
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问题详情:
—We’re doing a lot to protect our environment(环境), but it is not good enough.
—So we should try______ to look after it.
A. hard B. harder C. hardest D. carefully
【回答】
B
知识点:动词和动词短语
题型:选择题