30. —This wall of air is an effective answer to the problem and it ______ work.
—But it is a question to put such a wall of air around the statue.
| A．may | B．must | C．should | D．Could |
Though his salary is _____ , he always ____ money, in debt.
| A．good; lends | B．fine; borrows | C．fine; lends | D．good; borrows |
Leaves flying in the air, it _____ the old good days I spent in the mountain village.
| A．suggests | B．suggest me | C．thinks | D．thinks of |
Standing on top of the mountain, we watched the sun ____ the horizon.
| A．sink below | B．sinking under | C．sinking below | D．sink under |
–It’s getting dark, Tim. Mum must be expecting me home.
---Don’t worry. I’ll _____ in my car.
| A．send you home | B．send you to home |
| C．take you home | D．drive you to home |
It’s hard for us to make a choice, which means we have not decided _____.
| A．to take a step | B．to take which step | C．which step to take | D．to take what |