问题
选择题
Joan stood outside a shopping mall for a long time, as if ________ somebody.[ ]
A. to wait for
B. waiting for
C. waited for
D. having waited for
答案
答案：B
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Joan stood outside a shopping mall for a long time, as if ________ somebody.[ ]
A. to wait for
B. waiting for
C. waited for
D. having waited for
答案：B