We must notice the use they are the new energy.
| A．made for |
| B．making from |
| C．making of |
| D．made up of |
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 |
Before the tourists set off, they spent much time setting a limit __________ the expenses of the trip.
| A．in |
| B．for |
| C．to |
| D．about |
There is a limit __________ people's life, but no limit __________ the knowledge.
| A．on; to learn |
| B．to; to learn |
| C．on; learning |
| D．to; to learning |