1.Now I find the problem _________.
A.easy to work out B.easily to work it out C.to work out easily
D.is easy to be worked out
2.The teacher came in and asked _______.
A.what the mather was with him B.what was the matter with him
C.what wrong was with him D.what is wrong with him
3.The man kept silent in the room unless _____.
A.spoken B.spoke to C.speak D.spoken to
4.I think the pen must be ______,but ______ can it be?
A.somebody else's;whose else B.somebody else;whose else's
C.somebody who else's D.somebody else's;who's else
5.Carl _____ to ask his taecher for leave,but he _____ not do so.
A.need;dare B.needs;dares C.needs;dare D.need;dares
选出答案,并请分别详细地解析各道题!!!谢谢了!!!满意了一定高分!!!