问题
选择题
They wanted to know _______ 1,600 words as soon as possible. [ ]
A. how can they learn
B. how could they learn
C. how they can learn
D. how they could learn
答案
答案：D
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They wanted to know _______ 1,600 words as soon as possible. [ ]
A. how can they learn
B. how could they learn
C. how they can learn
D. how they could learn
答案：D