问题
选择题
A group of middle school students spent two weeks _____ the jungle. [ ]
A. trekking through
B. trekking across
C. to trek across
D. to trek through
答案
答案：A
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A group of middle school students spent two weeks _____ the jungle. [ ]
A. trekking through
B. trekking across
C. to trek across
D. to trek through
答案：A