问题
选择题
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
答案
答案：A
题目分析：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。
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。