题目内容
--Is Tom still in New York or already back at home?
--I’m not sure ________. I’ll call to make sure.
A. how he will be back B. that he has come back
C. why he has come back D. if he has been back
D
【解析】
试题分析:句意:—汤姆仍在纽约呢还是已经回到家了?—我不知道他是否已经回来。我打个电话核实一下。A. how he will be back 他如何回来;B. that he has come back他已经回来了;C. why he has come back 他为什么已经回来了; D. if he has been back他是否已经回来。根据语境及选项意思,故选D。
考点:考查宾语从句。
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