— What made your skin look so terrible?
— _______ to the sunlight for a long time.
| A．Because it was exposed | B．After being exposed | C．Being exposed | D．Exposed |
The school headmaster forbids ______ in the office.
| A．smoking | B．to smoke | C．us smoke | D．from smoking |
We were listening closely to the lecture yesterday evening when suddenly the light _______.
| A．had been gone out | B．was going out |
| C．was gone out | D．went out |
________ the boss has arrived, let’s begin our discussion right away.
| A．If | B．When | C．Now that | D．Even if |
The way ______ was thought of by him ______ the experiment was similar to the way _____ you carried it out.
| A．that, doing, which | B．which, of doing, in which |
| C．what, to do, \ | D．it, of doing, that |
---- What ________ great fun it would be if we could light candles to celebrate his birthday!
---- Forget it! The teacher in charge of our dorm won’t be happy to see that.
| A．/; / | B．/; the | C．a; the | D．a; / |