—Have you _____ spoken to a foreigner? —

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问题选择题

—Have you _____ spoken to a foreigner?

—Yeah. [ ]

A. still

B. already

C. ever

D. yet

答案

答案：C

选择题

Mark was a student at this university from 2006 to 2011，________he studied very hard and was made Chairman of the Students’ Union.

A．during which time

B．for which time

C．during whose time

D．by that time

单项选择题共用题干题

男，40岁，急性肠梗阻2天，呕吐频繁、乏力、口渴、尿少、口唇干燥、眼窝下陷、皮肤弹性差，脉搏116次/min。化验：Hb163g/L，红细胞压积0.55，血清钠140mmol/L，血清钾4mmol/L。

低钾血症的症状主要是（）。

A.口渴

B.肌无力

C.尿少

D.头晕

E.以上都不对