I have not seen him_____ he went to college.
| A．when | B．before | C．as | D．since |
Our country ________ great changes in the past 30 years and it is no longer________ it used to be.
| A．went through; what | B．has gone through; that |
| C．experienced; that | D．has experienced; what |
Not everybody knows exercising too much can_________ serious pain and even injuries.
| A．attach to | B．attend to |
| C．contribute to | D．devote to |
—Jane looks down today, what’s up?
—Well, ________happened between Jane and me is none of your business.
| A．whichever | B．whatever |
| C．no matter which | D．no matter what |
All his hard work finally ________ in the summer of 2014, when he was admitted to his dream university.
| A．took off | B．ran off |
| C．set off | D．paid off |
How much cheaper do you think a flat in the countryside is than ______ in the downtown?
| A．one | B．it | C．that | D．those |