The air pollution in this area caused the of many trees.
| A．die | B．died | C．death | D．dying |
I have ______ money than you, but I have _______ friends than you.
| A．more, more | B．less, more |
| C．fewer, more | D．more , less |
Can you see______11-year-old boy and ______one-year-old cow in the field?
| A．a; an | B．an ; a | C．a; a | D．an ; the |
She______know the answer, but I’m not sure.
| A．maybe | B．may be |
| C．may | D．must |
—Our family are travelling to Hong Kong for holidays.
-- ____________!
| A．OK | B．See you later. |
| C．Have a good time | D．Take care. |
The more careful you are, the ____ mistakes you will make.
| A．few | B．fewer | C．fewest | D．Less |