—Tom came to work last Friday ,but no one has seen him since.
— he have had an accident ?
| A．Should | B．Must | C．Might | D．Could |
Things lost sometimes just turn up ________ you never expect to find them.
| A．unless | B．where | C．after | D．as if |
— Why does Thomas speak through every discussion but never listen to the others?
— That’s what he ________ do．We used to hate that, but are used to it now.
| A．ought to | B．can | C．will | D．might |
Shirley came to “power” as homework monitor two weeks ago, only __________ this morning, ________ it too big a responsibility for her．
| A．resigning; to feel | B．to resign; to feel |
| C．resigning; feeling | D．to resign; feeling |
—Mum, where is my toy cowboy? I ________ it under the bed.
—It ________ inside your toy bucket．Remember, that’s where all your toys are supposed to go.
| A．have put; is | B．put; is |
| C．have put; was | D．put; was |
30．Frank’s marriage to the billionaire’s daughter got him through his hardest time, ________ years later he wondered what he could have done differently 。
| A．therefore | B．and | C．however | D．but |