问题

Our school had about 20 notebook computers but only one-forth_____used regularly. Now we have 50 working all day long.

A:is
B:are
C:was
D:were

正确答案是：

同类题型

下列各句中加点的成语的使用，正确的一项是（3分）

Information obtained from libraries is sooner forgotten than ____

____ ， I will not buy it

Why was our foreign teacher unhappy yesterday?——News about the tsunami striking her country ____ an attack of homesickness.

It was a very long day for Jack. He didn’tget home fromschool ____ six o’clock.