问题

He found very difficult the math problem.

A:that；to solve
B:this；solving
C:it；to solve
D:it；solving;

正确答案是：

同类题型

Hey，Mary.________—I can’t find my watch.I’m looking for it here.

You should be punished if you to your teacher.

a great forany man to be able to talk or hear, neither ignorantly nor ridiculously, uponany subject

下列句子中，加点的成语使用不恰当的一项是（3分）

His first book ______ next month is based on a true story.[ ]