________ by many potential customers, the salesman had to gather his courage and sell the product in different ways.
A. Having deniedB. Denying
C. Being deniedD. Having been denied
They are smiling. There ______ much trouble solving the problem.
A. couldn’t beB. mustn’t be
C. can’t have beenD. mustn’t have been
— Did you go to last night’s concert?
— Yes. And the girl playing the violin at the concert _______ all the people present with her excellent ability.
A. impressedB. comparedC. conveyedD. observed
I’m sorry I’m busy now. If I ____ time, I would certainly go to the movies with you.
A. haveB. hadC. have hadD. had had
It rained heavily overnight and not until this morning __________.
A. had it stoppedB. did it stop
C. stopped itD. it stopped
Wechat intends to radically change the way ______ people use mobilephones.
A. /B. whichC. whyD. who
