After spending a wonderful weekend, Jim would have to return to his ________ duties on Monday.
| A．common | B．normal |
| C．regular | D．usual |
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. — _______ .
— Drop in if you have time.
—Sure. Bye!
| A．Well, I really must be going now. | B．I wonder if you could let me go now. |
| C．Do you mind if I leave now? | D．What a shame that I want to go now! |
．He’s unlucky, and he’s always suffering _____ luck one after another．
| A．a sick | B．an ill | C．sick | D．ill |
．A computer is so useful a machine ________ we can use everywhere．
| A．that | B．whic h |
C．as | D．what |
He ________ the window of our classroom yesterday because he didn’t come to school．
| A．mustn’t have broken | B．mightn’t have broken |
| C．shouldn’t have broken | D．couldn’t have broken |
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