If he_____his teacher' s advice, Asafa Powell would not be the fastest man in the world.
| A．didn't follow | B．wouldn't have followed |
| C．hadn' t followed | D．hasn' t followed |
Our neighbor offered to look after our baby yesterday when we were busy, _____is often the case.
| A．it | B．that | C．which | D．as |
---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 |