There are several reasons _____ the smog days in many parts of China.
A. account forB. accounted for
C. accounting forD. to be accounted for
I am feeling too tired to drive any more. Will you _____?
A. take upB. take onC. take outD. take over
Vince heard the news that the Chinese soccer team lost the game again, ______.
A. tears coming down his faceB. his tears came down
C. tears came down his faceD. tears had already come down
_____ told that the concert was cancelled, many fans still gathered outside the stadium , waiting for the pop singer.
A. UnlessB. ThoughC. WhenD. Whether
WeChat provides a networking platform ______ communication is faster and easier.
A. whichB. whenC. whereD. why
The professor ______ sit in his study for hours when he worked on the new project.
A. couldB. mightC. wouldD. should
