.If _____,the experiment will be successful.
| A．carefully doing | B．it done carefully | C．carefully done | D．doing carefully |
The ______ he drew from his simple experiment is not scientific.
| A．conclusion | B．charge |
| C．promise | D．relation |
The school bus was ______ by a thick fog.
| A．held up | B．broken off |
| C．kept up | D．put off |
You can't ______ of being lonely when you don't make an effort to meet people and make friends with them.
| A．explain | B．complain |
| C．confirm | D．admit |
If we work with a strong will, we can ______ any difficulty, however great it is.
| A．overturn | B．overtake |
| C．overcome | D．overwork |
Some smoking and alcoholic drinks are a (n) ______ taste and are not inborn.
| A．gained | B．developed |
| C．acquired | D．grown |