问题

The company had about 20 notebook computers but only one third ________ used regularlyNow we have 60 working all day long[ ]

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

正确答案是：

同类题型

Nothavingfinishedhishomework,______towatchTV

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No one except my parents _____anythingabout it.

How about the trip to Shanghai, Kitty?—Everything was fantastic if our car didnot _______ for some times on the way.

Oh,dear! —- ______ —- I’ve found I left my English book at home.