It is the idea____smiles can get rid of cold ____has been proved by the researchers many times.
| A．which; which | B．that; that | C．that; which | D．which; that |
It is ________ tradition for people in this country to pay in ________ cash when buying things.
| A．the; 不填 | B．a; 不填 | C．不填; the | D．a; the |
You can tell him everything，as he is a man who you can _____ on.
| A．rely | B．attach | C．perform | D．affect |
Susan advised me not to buy the vase, but I bought it _____.
| A．anyhow | B．however | C．though | D．Totally |
The two top students in Mr. Green’s class competed _____ each other for the highest marks.
| A．to | B．for | C．in | D．Against |
Everyone has periods in their lives________ everything seems very hard.
| A．when | B．where | C．which | D．That |