问题

Why was Professor Wang unhappy recently—Because the theory he insisted on ________ wrong.

A:proving
B:proved
C:being proved
D:was proved

正确答案是：

同类题型

You had made a serious mistake. Luckily you corrected it ________ it got worse.

_______,but it is also a great way to lower the number of greenhouse gases in the air.

Things go back to ______ since we paid off all our debts.

.I have just come in to see if I can be _________ any assistance to them

下列各句中，没有语病的一句是