---How long has your brother been working in this factory?
---_____he dropped from school in 2010.
A. When B. Until C. Since D. Before
I am very grateful to my high school teachers, without _____help I wouldn’t be so excellent.
A. whom B. their C. which D. whose
Measures _____to stop housing prices from rising too fast, but it remains to be seen whether they still work.
A. are taking B. had been taken C. have taken D. are being taken
The young man is determined to _____a small business of his own after he graduates from college.
A. set up B. make up C. bring up D. turn up
On December 10,2013,many world’s top leaders went to Johannesburg _____Nelson Mandela, who had passed away.
A. in honor of B. in favor of C. in search of D. in return of
Joan has been missing for a couple of days and there is growing _____for her safety.
A. attention B. danger C. concern D. hope
