Question

_______ on earth do you suppose_______ this?

1. A.
   What; could do
2. B.
   What; could have done
3. C.
   Who; do
4. D.
   Who; could have done

Answer 1

D
试题分析：句意：你究竟认为谁能做这件事？这里是特殊疑问句，do you suppose是插入语，插入语的语序必须是陈述语序，这里正好疑问词作主语，做事必须是某人来做所以排除AB，这里who做主语时，谓语动词应该用单数，故排除C。所以应选D。
考点：考查插入语的用法。
点评：本题难度适中。插入语在近几年的高考中经常出现，有插入语的句子增加了试题的难度，考生如果分不清插入语与句子的其他成分，很容易判断错误；这里考生容易误选C。
即学即练：Many people thought little of me，but I did what______.
A.I thought I was right                 B.I thought it was right
C.I thought was right                   D.I was thought right
解析：C。句意：把插入语I thought抽掉，然后观察句子，答案就明显了；what引导了一个宾语从句，宾语从句中含有一个插入语I thought。