A woman saw it—— when she was walking——.（ ） A.happening；past.B.happen；passe
问题描述：
A woman saw it—— when she was walking——.（ ） A.happening；past.B.happen；passe
A woman saw it—— when she was walking——.（ ）
A.happening；past.B.happen；passed
C.happen；past.D.to happen；passed
答
选C.
A woman saw it happen when she was walking past.一位妇女走过的时候,看到它发生
saw it happen “看到事情发生”,past修饰walking.