My brother spent about two days________the project．
| A．for |
| B．with |
| C．in |
| D．on |
We're not sure if it _______ tomorrow. If it _______, we won't go hiking.
| A．will rain; rains | B．will rain; will rain |
| C．rains; rains | D．rains; will rain |
If it ________ tomorrow, we will go to the zoo.
A. isn’t rain B. doesn’t rain C. won’t rain
——What do you think of our school basketball team?
——They’re going to lose the match __________ they improve their skills.
| A．unless | B．until | C．if | D．as |
——Why did Tan become interested in the sounds of nature?
——__________he thinks the best music comes from nature.
| A．Since | B．As | C．Because | D．For |
The price of petrol(汽油) is not _______ that of last year, so some more people are planning to buy cars.
| A．as expensive as | B．so cheap as |
| C．as low as | D．so high as |