问题

It was with great joy _______ he worked out theproblem that he had long been puzzled about.

A:which
B:that
C:because
D:since

正确答案是：

同类题型

Don’t talk in class, _________ –Ok, ________.

The television is a _____ machine.

e of the continuous bad weather, the buildingwork of the bridge over the Yangtze River is far behind

I am afraid I don’t quite follow you .— Let me make it ______. We do not want you here .[ ]

下列各句中，没有语病的一句是（3分）