You shouldn’t stand there _____ the milk ____ over.
| A．watching; boiled | B．watching; boiling | C．to watch; boiling | D．to watch; boiled |
I ________ the pages together with a paperclip.
| A．attached | B．fixed |
| C．fastened | D．tied |
The dictionary is being printed and it will soon ________.
| A．turn out | B．come out |
| C．start out | D．go out |
—The plane is due to take off at 7：50 from the airport.
—________ we fail to arrive there on time?
—Try to take another flight then.
| A．What if | B．As if |
| C．Even if | D．Only if |
The traditional view is ________ we sleep because our brain is “programmed” to make us do so.
| A．when | B．why | C．whether | D．that |
The door burst open and ________，shouting with anger.
| A．in rushed the crowd | B．rushed in the crowd |
| C．the crowd in rushed | D．in the crowd rushed |