—Catherine, I have cleaned the room for you.
—Thanks. You _____it. I could manage it myself.
| A．needn’t do | B．needn’t have done |
| C．mustn’t do | D．shouldn’t have done |
We have to study for a bright future, so we have to lose some sleep we're worn out.
| A．in case | B．as though | C．as long as | D．even though |
Nowadays electrical energy from the sun has become the most widely used energy.
| A．comes | B．coming | C．to come | D．came |
The country has changed so greatly over the past three decades that it has grown my wildest imagination.
| A．in | B．of | C．without | D．beyond |
Creative people are in a better position to succeed in both university and society than who may just be good test-takers.
| A．that | B．those | C．one | D．they |
－This is a gas station! And you know smoking is forbidden here.
－Oh, terribly sorry.
| A．will | B．can | C．may | D．must |