You ______ worry about their safety. They are old enough to take care of themselves.
| A．mustn’t | B．needn’t | C．can’t | D．wouldn’t |
His father came out of prison ______ Dickens have a chance to go to school.
| A．Not before; had | B．Only before; would have |
| C．It was until; had | D．Not until; did |
School children must be taught how to deal with dangerous ______ .
| A．states | B．conditions |
| C．situations | D．positions |
He has been to general manager because of his excellent work in the company.
| A．proposed | B．produced |
| C．promoted | D．programmed |
Despite some difficulties，China has achieved a lot in the past year ______ .
| A．off balance | B．in the balance |
| C．on balance | D．on the balance |
After you have used the dictionary, please put it back ______ it belongs.
| A．to whom | B．to which |
| C．what | D．where |