有关HIV感染临床Ⅱ期的描述，下列哪项是错误的

A．没有任何临床症状

B．血中检测不出HIV

C．血中可检出抗HIV

D．有传染性

E．血中检出P24

(2013·湖南高考)He ________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.

A．wouldn't

B．shouldn't

C．couldn't

D．mustn't