--- Do you know the reason _________ pilots turn off the plane’s lights before taking off?
---The practice is for the passengers to adjust to the dark _________ an emergency.
| A．why; for fear that | B．for which; in case of |
| C．how; for fear of | D．that; in case |
If you plant watermelon seeds in the spring, you __________ fresh watermelon in the fall.
| A．eat |
| B．would eat |
| C．have eaten |
| D．will be eating |
-Guess what, we've got our visas for a short-term visit to the UK this summer.
-How nice! You __________ a different culture then.
| A．will be experiencing |
| B．have experienced |
| C．have been experiencing |
| D．will have experienced |
The how to book can be of help to __________ wants to do the job.
| A．who |
| B．whomever |
| C．no matter who |
| D．whoever |
With a good __________ of Chinese, Helen was hired to do the task of communication with the Chinese company.
| A．program |
| B．command |
| C．guidance |
| D．ability |
The teacher commanded that the students __________ the classroom before he returned.
| A．didn't leave |
| B．wouldn't leave |
| C．needn't leave |
| D．shouldn't leave |