问题
选择题
Last summer I took a course on _____ poisonous gases. [ ]
A. how to deal with
B. what to deal with
C. how to be dealt with
D. what to be dealt with
答案
答案：A
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Last summer I took a course on _____ poisonous gases. [ ]
A. how to deal with
B. what to deal with
C. how to be dealt with
D. what to be dealt with
答案：A