---- Tom came to work last Sunday, but no one has seen him since.
---- _____ he have had an accident?
| A．Must | B．Should | C．Might | D．Could |
Cloning humans has been _____ in the science world for many years and it is likely to continue .
| A．ridiculous | B．contemporary |
| C．controversial | D．contradictory |
—You have to believe in yourself. No one else will, if you don’t.
—_______. Confidence is really important.
| A．It’s not my cup of tea |
| B．That’s not the point |
| C．I don’t think so |
| D．I couldn’t agree more |
Some 5-star hotels specialize in mouth-watering buffet（自助餐），offering a rich selection of quality food. With a discount card, you can surely drink and eat to your heart’s _________.
| A．association | B．circulation |
| C．entertainment | D．content |
— What will you do during the summer holiday?
—I don’t know, but it’s high time ________ something.
| A．I’m deciding | B．I’ll decide |
| C．I decide | D．I decided |
The judge permitted the couple ________ the boy who became an orphan after the earthquake.
| A．adapting | B．to adapt |
| C．adjusting | D．to adopt |