The man we followed suddenly stopped and looked as if ( ) ..The man we followed suddenly stopped and looked as if () whether he was going in the right direction.A.to seeB.seeingC.to have seenD.having seen为什么不选B?求逐项分析.

问题描述:

The man we followed suddenly stopped and looked as if ( ) ..
The man we followed suddenly stopped and looked as if () whether he was going in the right direction.
A.to see
B.seeing
C.to have seen
D.having seen
为什么不选B?求逐项分析.