题目内容
The man we followed suddenly stopped and looked as if ________ whether he was going in the right direction．
[ ]
A．
seeing
B．
having seen
C．
to have seen
D．
to see
答案：D
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题目内容
The man we followed suddenly stopped and looked as if ________ whether he was going in the right direction．
seeing
having seen
to have seen
to see