The WTO can't live up to its name _________it doesn't include acountry that is home to one fifth of mankind.
| A．as long as | B．while |
| C．if | D．even though |
The plane takes off at 6:00 p.m. So I have to arrive at the airport ________ 5:30 p.m. at the latest.
A after B. since C. until D. by
--How long ________ as an assistant here?
-- Ever since I finished middle school.
| A．are you working | B．did you work |
| C．have you been working | D．do you work |
--Forgive me for hurting you by saying so.
--________
| A．You are welcome |
| B．It’s not your fault. |
| C．Oh, well, that’s life. |
| D．That’s not important |
They had ________ in keeping in touch with each other that they decided to move to the same city.
| A．such many difficulties |
| B．such much difficulty |
| C．so many difficulty |
| D．so much difficulty |
--Is this the office ________ your parents are working now?
--No. They are working in the next one.
| A．in which | B．in where |
| C．that | D．which |