The______of AIDS has led to an expansion in research seeking a cure.-考呗网

单选题The______of AIDS has led to an expansion in research seeking a cure.

A．proliferation
B．selection
C．innovation
D．conviction

【答案】A。解析：本题考查名词辨析。句意为“艾滋病的扩散使得人们做更多的研究工作去寻找治疗的方法”。proliferation意为“激增；扩散”；selection意为“选择；选拔”；innovation意为“革新，创新”；conviction意为“定罪，判罪”。故选A。

1 It seems oil______from this pipe for some time. We'll have to take the machine apartto put it right.

A．leaked
B．is leaking
C．had leaked
D．has been leaking

2 There is a real possibility that these animals could be frightened,a sudden loud noise. ______

A．being there
B．should there be
C．there was
D．there have been

3It was not______she took off her dark glasses______I realized she was a famous actress.

A．when ; that
B．until ; that
C．until ; when
D．when ; then