__________car traffic in city centers and make the air cleaner, some countries made rules that drivers should pay extra money if they drive in the city centers.
| A．Reduce | B．Reducing |
| C．To reduce | D．Reduced |
I don’t know if it ____ tomorrow. If it ___, I will stay at home.
| A．will rain; rains | B．rains; will rain |
| C．will rain; will rain | D．rained; rains |
If you don’t study English all the time, you’ll have a difficult time ____ it in the future.
| A．studying | B．to studying | C．studied | D．be studying |
All the students went home after school _______ Linda, for the teacher said he had something to talk about with her.
| A．except | B．without | C．besides | D．with |
Could you please tell me _______?
| A．where do you live | B．what time you usually get home |
| C．why are you late for school | D．what did you do last weekend |
I found ________ difficult to work out the problem without a computer.
| A．that | B．it | C．this | D．myself |