问题
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
B:is remained to do
C:remains to do
D:is remaining to be done
正确答案是：
同类题型
Why do you look so worried? —My Macbook Pro broke down and my paper _____unfinished since
_____________ the doctor , the old man is out of danger.
It was foolish of you to take a taxi______you could walk there in five minutes
deadline is drawing, but I failed to challenge the task a third time.— ______ my brother have a try