问题
选择题
Could you tell us ______? [ ]
A. what they were doing last night
B. what did they do yesterday
C. when are they going to plant trees
D. which would you like to have
答案
答案：A
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Could you tell us ______? [ ]
A. what they were doing last night
B. what did they do yesterday
C. when are they going to plant trees
D. which would you like to have
答案：A