问题

Thanks to the application of new farming methods,output is now six times _____it was before 2000.

A:that
B:what
C:which
D:how

正确答案是：

同类题型

I won’t tell the student the answer to the math problem until he ________ on it for more than an hour

The______of the building are covered withlotsof

下列各句中，没有语病的一项是（）

you should have taken me to the football match this morning.—I had intended to, but I couldn’t spare any time, I _____ a report.

I have bought two pens, ____ write well.