单项选择题

Smokingisamainlydirectcauseofcancer.()

A.brain
B.throat
C.lung
D.skin
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单项选择题
Youtakeclassesfollowthe.()
A.timelist
B.timesheet
C.timebook
D.timetable
判断题
I always turn to her for helpwhenever I in trouble. ()
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