单项选择题
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
点击查看答案&解析
相关考题
-
单项选择题
The local government tried its best to ensure each of its citizens a（）supply of food at regular intervals (时间间隔).
A.consistent
B.continual
C.continuous
D.numerous -
单项选择题
The United Nations Conference on Global Environment, which took place earlier this year in Vienna, was a very（） meeting.
A.productive
B.communicative
C.aggressive
D.protective -
单项选择题
We watched the plane（）behind the clouds.
A.disappearing
B.disappeared
C.diving
D.dived
