—Oh, my God! My English book is nowhere to be seen.
—You __________ it at home.
| A．should have left | B．would have left |
| C．must have left | D．could have left |
Some people fear that _____ air population may bring about changes in _____ weather around the world.
| A．/; the | B．the; / | C．an; the | D．the; a |
How much ______ she looked without her glasses!
| A．well | B．good | C．best | D．better |
----What is the price of petrol these days?
----Oh, it _____ sharply since last month.
| A．is raised | B．has risen | C．has arisen | D．is increased |
The practice of hanging clothes across the street is a common _____ in many parts of the city.
| A．sign | B．view | C．look | D．sight |
If you leave the club, you will not be _____ back in.
| A．received | B．admitted | C．moved | D．turned |