___ he will come or not is_____ worries us.
| A．Whether, why | B．Whether, what | C．If, that | D．If, which |
I can’t stand _____with Jane in the same office. She always keeps complaining.
| A．work | B．to work |
| C．working | D．works |
Williams sisters completed their high school_______ developing their tennis careers.
| A．as | B．until |
| C．when | D．while |
---Did you see a man in black pass by just now?
---No, sir. I _______ a newspaper.
| A．read | B．was reading |
| C．would read | D．am reading |
Hurry up, _______ you will miss the bus.
| A．otherwise | B．however |
| C．and | D．so |
Attention, please！The plane to London_______ off at 9: 00.
| A．took | B．takes |
| C．was taking | D．has taken |