Measures have been taken to prevent the accidents, but much _____ for more improvement.
A.remains to be done
B.is remained to do
C.remains to do
D.is remaining to be done
网友回答
A解析试题分析：这题考察remain的用法：remain不及物动词，不用被动语态，remain to be done“仍然要被做”，句意是：防止事故已经采取了很多措施，但是还有很多事有待去做。选A。考点：考查动词的用法点评：动词的用法主要考虑时态语态，还有一些固定搭配也要平时记忆。