问题
选择题
—Mr Jackson, _______ we go rock climbing?
—Yes, but you must use ropes. [ ]
A. must
B. should
C. need
D. can
答案
答案：D
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—Mr Jackson, _______ we go rock climbing?
—Yes, but you must use ropes. [ ]
A. must
B. should
C. need
D. can
答案：D