Question

The maths problem can be.________

1. A.
   easy worked out
2. B.
   easy to be worked out
3. C.
   easily worked out
4. D.
   easily to work out

Answer 1

C
这题考查被动语态和副词，修饰动词短语应该用副词，如果用句型：Sb/sth is +adj+to do,的话，不定式应该是主动表示被动。选C。句意是：这个数学题目很容易算出。