John received an invitation to dinner, but with his work ____,he couldn't go.
| A．finished | B．finishing |
| C．having finished | D．to finish |
This shop will be closed for repairs __________ further notice.
| A．with | B．until | C．for | D．at |
Xi Jin-ping, vice chairman of China had a friendly talk with Obama, president of America __________ supper yesterday.
| A．with | B．in | C．over | D．at |
—Did you give Jenny the money?
—Yes. __________ I saw her, I'm sure.
| A．So long as | B．So far as |
| C．The moment | D．Any time |
Experts say walking is one of the best ways for a person to __________ healthy.
| A．preserve | B．stay |
| C．maintain | D．reserve |
It is generally considered unwise to give a child __________ he or she wants.
| A．however | B．whatever |
| C．whichever | D．whenever |