(单选题)

There have been many ______ in their marriage but they still love each other.

A.ups and downs

B.from head to toe

C.time and again

D.over and over

参考答案：A

参考解析：

考查介词短语辨析。句意：他们的婚姻经历了很多起伏坎坷，但他们仍旧相爱。ups and downs意为“起伏，沉浮”；from head to toe意为“从头到脚”；time and again意为“一次又一次”；over and over意为“反复，再三”。只有A选项符合原句子的意思。故选A。

知识点：