Granny always keeps her cellphone switched off _________she's expecting a call．
A. Since B. unless
C. once D. when
﹣﹣﹣Why not turn to Kevin？ He saw what happened， so his is the only _________ account．
﹣﹣﹣The problem is that he has refused to say anything about the accident．
A. tentative B. controversial
C. authentic D. arbitrary
_________ with heavy loads of teaching _________ he later became an easy target of the flu．
A. So tired was the teacher； that B. The teacher was so tired； which
C. Tired as the teacher； that D. Such was the tired teacher； which
Studies suggest that babies learn to _________ voices before birth． They can recognize their mother's voice among a group of women．
A. suspect B. compromise
C. discriminate D. inspect
﹣﹣﹣Who is the most famous martial arts novelists？
﹣﹣﹣Jin Yong， __________works deeply influenced the cultural development of Chinese﹣speaking communities around the world．
A. he B. his
C. who D. whose
Just tell Mike __________ has a good knowledge of physics and history is qualified for the position．
A. Whenever B. Whomever
C. Whoever D. Whichever
