It is a common in the USA that you should make an appointment if you want to see a doctor.
| A．rule |
| B．sense |
| C．practice |
| D．habit |
It was ___ that he had to ask for help.
| A．such big a job | B．so a big job | C．so big a job | D．a such big job |
The man ______ talked to you just now is an engineer.
| A．who | B．whose | C．which | D．what |
All ______ we need is to be supplied with food and clothing.
| A．what | B．that | C．which | D．whom |
Play, often seen as _______ activity for kids ,is still important in _____ development of teenagers.
| A．the ; the | B．an; the | C．an ;不填 | D．the；不填 |
The oil price has _______ a lot these days because of the war .
| A．gone back | B．gone up | C．gone over | D．gone out |