13. ___ had they reached the 30th floor ____ they realized that they had forgotten to take the key.

A．Hardly; than

B．Hardly; when

C．No sooner; when

D．No sooner; then

40岁，女性，肺结核涂阳患者正规抗结核治疗2周，判断该患者有无传染性应该（）

A.做结核菌素试验

B.查痰结核菌

C.询问患者有无咯血

D.检查患者有无发热

E.拍胸片检查有无空洞