Question

Our school has about 100 computers, but only sixty percent ____ used regularly

1. A.
   is
2. B.
   are
3. C.
   was
4. D.
   were

Answer 1

B
试题分析：句意：我们的学校有100台电脑，但是通常地仅仅有6%被使用。这里sixty percent 后面省略了of 100 computers，谓语动词的单复数，根据介词of后的名词来确定，这里名词是可数名词，当然谓语动词用复数，根据前面的动词可知这里也应该用一般现在时，故选B。
考点：考查主谓一致的用法。