Rather than carry out the project by itself, the company planned to _________ with other potential cooperators.
| A．catch up | B．come up |
| C．keep up | D．team up |
When Ben’s house was on fire last night, several neighbors rushed to his and put out the fire.
| A．expectation | B．absence | C．assistance | D．requirement |
Jane from the company and moved to China in the hope of new opportunities.
| A．returned | B．resigned | C．escaped | D．learned |
This is the first study to compare the effects of the new drug with its side effects.
| A．beneficial | B．specific | C．powerful | D．potential |
All animals in nature must learn to to a changing environment in order to survive.
| A．attach | B．adapt | C．respond | D．turn |
Paul was not allowed to work he was fully recovered from the flu.
| A．even if | B．whether | C．because | D．until |