I think you should work harder ________ you are satisfied with the way things are.
| A．if | B．when |
| C．since | D．unless |
Tom has gone to Shanghai,_____ is in the east of China.
| A．where | B．who | C．which | D．that |
__ he is young, he knows a lot.
| A．Through | B．As | C．While | D．Due to |
I used to use English a lot and spent an hour each day _____ English books in the library.
| A．reading | B．to read | C．read | D．reads |
___ the first day, at the meeting, I sat next ____ a girl named Diana.
| A．On, with | B．At, to | C．In , by | D．On, to |
It is in the big factory ______________my father works.
| A．where | B．that | C．which | D．in which |