I’m sorry to ______ you, but can you tell me how to get to the library?
| A．bother | B．puzzle | C．annoy | D．worry |
We all know that we ________ our carbon footprint, but I suspect that many people wouldn't be prepared to go as far as Joan Pick, a retired scientist living in south London.
| A．must have reduced | B．should have reduced |
| C．may have reduced | D．could have reduced |
No matter how healthy you ________ be, you need to consult a doctor from time to time.
| A．should | B．will |
| C．must | D．may |
—May I smoke here?
—If you ________， choose a seat in the smoking section.
| A．should | B．could |
| C．must | D．may |
We can't use it to tie the goods because it ________ be broken at the weakest position.
| A．shall | B．may |
| C．can | D．would |
If the island ________ a tourist attraction, last week's earthquake would have caused far more deaths.
| A．remained | B．would remain |
| C．has remained | D．is to remain |