题目内容

It was not until dawn__________ the snowcapped peak in the remote area in Tibet.

A. that they sighted
B. did they sight
C. that they did not sight
D. had they sighted

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The children lined up and walked out（）.

A. in person
B. in private
C. in order
D. in progress

居社区获得性肺炎首位的是支原体肺炎。()
参考答案：错误

We‘d better make a clear __________between competence and performance for the convince of

A. separation
B. division
C. distinction
D. difference

与吸烟关系最明显的类型是鳞癌。()
参考答案：错误