—The air pollution is so terrible.
--It will be worse we do something to protect the environment.
| A．if | B．unless | C．after | D．when |
—How long have Mr．and Mrs．Smith________？
—For more than twenty years．
| A．married |
| B．had married |
| C．got married |
| D．been married |
根据汉语意思翻译句子。
所有的票都已经被卖光了。
All the tickets have been________ ________ ________．
—English isn’t as________as Chinese．
—Maybe，perhaps it’s just because Chinese is your native language．
| A．easy |
| B．easily |
| C．easier |
| D．easiest |
—There is something wrong with my foot．Dad，could you please________？
—No problem．
| A．cheer me up |
| B．give me a lift |
| C．look after me |
| D．make me a ride |
—Always look around________you cross the street，David．
—OK，I know，Mom．
A．until
B．before
C．unless