2016年首都经济贸易大学考博英语真题(单选题)

希赛网为考生们整理了2016年首都经济贸易大学考博英语单选部分真题，供考生们备考复习。

1、The beam that is ( )by a laser differs in several ways from the light that comes out of a flashlight.

A、transported

B、emitted

C、motivated

D、translated

2、We booked rooms at the hotel ( )we should find no vacancies on our arrival.

A、whenever

B、if

C、since

D、lest

3、Modern forms of transportation and communication have done much to ( )the isolation of life in Alaska.

A、break through

B、break down

C、break into

D、break out

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