The old man has retired from the factory. He _____ there for 30 years.
| A．works | B．worked | C．has worked | D．was working |
He___ have attended the meeting this morning. He has been staying at my home for a whole day.
| A．can’t | B．mustn’t | C．shouldn’t | D．needn’t |
______ another button and your meal is prepared and heated for you.
| A．If you press | B．To press | C．Press | D．Pressing |
Many teens don’t get enough sleep because they have ____ homework, ____makes them stay up at night.
| A．much too; which | B．too much; that | C．much too; what | D．too much; which |
—How about fried chicken?
—Oh, it ___ lots of fat.
| A．remains | B．contains | C．holds | D．includes |
I failed in the examination last term and only then ____the importance of study.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |