Briggs will ________as general manager when Mitchell retires.

A. get away                 B. take over                       C. set off                      D. run out

The streets here are crowded with cars, so I prefer________ here rather than_______ .

A. cycling; driving   B. to cycle; drive

C. cycle; to drive  D. cycling; to drive

His parents were teachers in that school, _______ lost their lives in order to save  their students in the earthquake.

A. none of them     B. both of them       C. none of whom   D. both of whom

You have no idea how she finished the relay race _______ her foot wounded so much.

 A. for              B. when             C. with          D. because 

Only when your identity has been checked, ___________.

A. you are allowed in                     B. you will be allowed in 

C. will you allow in                      D. will you be allowed in  

Generally speaking,        according to the directions, the drug has no side effect.

A. when taking      B. when taken     C. when to take     D. when to be taken  

 The university estimates that living expenses for international students ________ around $8,450 a year, which ________ a burden for some of them.

A. are；is          B. are；are        C. is；are         D. is；is