问题
The computer is ______useful tool in _______world today.
A:an; the
B:a; the
C:the; the
D:a; a;
B:a; the
C:the; the
D:a; a;
正确答案是：
同类题型
A _____ breakfast is good for your _______.
He _____ English for ten years by thetime he takes the examination
I _____as him because I think I _____ be wrong.[ ]
disease will produce a powder poison that will kill the patient.
Has the new act been passed?—Certainly. There’s only a smattering of people who ________ it.[ ]