问题补充:
Don’t touch anything in the lab unless.
A. to be allowed B. allowed C, to be allowing D.allowed to
答案:
解析:考查从句省略。完整的句子是:unless you are allowed to touch
时间:2019-08-22 23:15:41
Don’t touch anything in the lab unless.
A. to be allowed B. allowed C, to be allowing D.allowed to
解析:考查从句省略。完整的句子是:unless you are allowed to touch
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