---______ was your vacation?
--- It _____ exciting.
| A．How; were | B．What; were |
| C．How; was | D．What; was |
It’s silly you your car at such a low price．
| A．for; to sell | B．of; to sell |
| C．for; sell | D．of; sell |
Do you think _________ should be allowed to drive?
| A．sixteen-year-old | B．seventeen-year-olds |
| C．fifteen-year-old | D．eighteen-years-olds |
Swimming is good _____ our health, but at the same time we mustn’t forget the danger．
| A．for | B．at | C．on | D．with |
－I think teenagers should not be allowed to get car licenses．
－I agree．They are not _______．
| A．serious enough | B．something serious |
| C．nothing serious | D．enough serious |
---I think students should be allowed ___ homework with friends．
---I disagree．They talk instead of ________ homework．
| A．do, doing | B．to do, to do |
| C．to do, doing | D．doing, to do |