About seventy percent of our earth _______ by water.
| A．is covering | B．is covered |
| C．are covered | D．are covering |
—Jeff, would you mind _____ after drinking?
—Sorry, I won’t do that again.
| A．driving | B．not driving |
| C．not to drive | D．my driving |
—_______ is very important in the game.
—That’s right. One player doesn’t make a team.
| A．Housework | B．Practice |
| C．Teamwork | D．Exercise |
—What’s wrong with your sister?
—She broke the glass and hurt _______.
| A．herself | B．yourself | C．her | D．it |
—Must I clean all the plates after dinner?
—No, you ______ . But you ______ finish your homework later.
| A．mustn’t ; must | B．needn’t ; must |
| C．can’t ; must | D．needn’t ; may |
—The second-hand smoke is even more terrible.
—That’s right. It does great ______ to people around.
| A．fun | B．change | C．harm | D．worry |