are very popular with people all over the world, but do you know who was it that invented

are very popular with people all over the world, but do you know who was it that invented telephone?
A. The telephone; 不填
B. Telephone; a
C. The telephones; the
D. Telephones; the

A. The telephone; 不填B. Telephone; aC. The telephones; the(答案→)D. Telephones; the解析：第一空用telephones表示一类事物；发明物前一般要加定冠词the。

这下我知道了