Usually, we don’t know how important something is we lose it.
| A．or | B．until | C．as soon as | D．If |
Traffic is heavy and the price of oil is much ______ so that many people go to work by bus instead.
| A．higher | B．high | C．more expensive | D．expensive |
______ can make my mother change her mind. She is such a person who never gives up easily.
| A．Something | B．Anything | C．Nothing | D．Everything |
Although it seemed to be ______ painful experience, he still found it ______ fun.
| A．a, / | B．/, a | C．a, the | D．the, a |
--- Can I look at the menu for a few more minutes before I order?
--- Of course. _______, Sir.
| A．Make yourself at home | B．At your service |
| C．It doesn’t matter | D．Take your time |
We had to wait half an hour we had already booked(预定) a table.
| A．since | B．although | C．until | D．before |