Expo 2010 Shanghai China will offer ____ wonderful opportunity for ____ cross - culture dialogues．
| A．a;不填 | B．a; the | C．不填;the | D．the;不填 |
______ you ever have any trouble, let me know.
| A．If | B．Whenever | C．While | D．X |
______, the library was closed.
| A．Sunday | B．Being Sunday | C．It to be Sunday | D．As it was Sunday |
Tom and Jack went ______ they could find work.
| A．every place | B．the city where | C．the place where | D．wherever |
He wrote his first novel ______ studying in a university.
| A．since | B．as | C．while | D．with |
The doctor ______ she sent her friend is very famous.
| A．to whom | B．to whose | C．whom | D．at whom |