Even a drop of water ______because it is so important to all the living things.
| A．must waste | B．must be wasted |
| C．mustn’t waste | D．mustn’t be wasted |
Li Hua studies English very _____and her English is _____in her class.
| A．careful, good | B．carefully, well | C．careful, best | D．carefully, the best |
We should protect the animals ______danger.
| A．on | B．in | C．of | D．at |
Nobody teaches me English. I learn it all by______.
| A．I | B．my | C．myself | D．me |
—How was your weekend, Jeff？
—I had great ＿＿＿ watching a football game.
A. interest B. time C. Fun
—Be quiet, Mr Smith is coming.
—Don’t worry. It ＿＿＿ be him. Mr Smith is much taller.
A. mustn’t B. must C. can’t