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题目内容
（当代英语语法概论）
If I had not stood under the ladder to catch you when you fell, you ( ) now.
A.couldn.t have smiled
B.wouldn.t be smiling
C.didn.t smile
D.won.t smile
A.couldn.t have smiled
B.wouldn.t be smiling
C.didn.t smile
D.won.t smile
参考答案