题目内容
A lot of flights were _______ because of the smog(雾霾)last month.
A) put down B) put up C) put off D) put out
C
练习册系列答案
相关题目
题目内容
A lot of flights were _______ because of the smog(雾霾)last month.
A) put down B) put up C) put off D) put out
C