China ______ the WTO for more than 10 years, and it has brought great changes to it.
| A．has joined | B．has been in | C．has become a member of | D．has joined in |
You’d better look up the new word in a dictionary____ you don’t know it.
| A．if | B．as | C．though | D．whether |
Nobody ____ the answer now.
| A．know | B．knowing | C．knows | D．knew |
I have some problems with my English writing. Can you give me some_____?
| A．messages | B．decisions | C．information | D．advice |
— Whose pen is this?
— Oh, it’s_____. I was looking for it everywhere.
| A．you | B．yours | C．me | D．mine |
The 18th National Congress of the CPC has been one of______things in our life recently.
| A．important | B．more important | C．most important | D．the most important |