问题补充:
How long do you suppose it is he arrived there?
A. when
B. before
C. after
D. since
答案:
A. when
B. before
C. after
(答案→)D. since
解析:考查连词辨析。A当…时;在那时;B在…之前;C在…后;D自从,既然;句意:你认为从她到那里到现在有多久了?根据句意说明D正确。
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