—I don’t want to move to that city. It is heavily polluted.
—Pollution is common. The city here is _____.
| A．no less clean | B．no clean | C．no cleaner | D．not less clean |
Rather than ______ at home, he prefers ______ out to play football even on a cold day.
| A．to stay; to go | B．staying; to go | C．stay; to go | D．staying; going |
______ you call me to say you’re not coming, I’ll keep waiting for you at the theatre.
| A．Unless | B．When | C．If | D．As |
A chair made of steel is stronger, though costs much more, than _____ made of wood.
| A．that | B．one | C．it | D．those |
In autumn, it’s beautiful outside with golden fallen leaves _______ the ground.
| A．covering | B．to cover | C．having covered | D．covered |
I’d appreciate _____ if you would like to teach me how to use the computer.
| A．that | B．it | C．this | D．you |