Things made of plastic are usually _______, but they are _______ to get polluted.
| A．cheap; easy | B．cheap; easier | C．cheaper; easy | D．cheaper; easier |
Poor thing! Jack had a fall while he ______on the ice. He got hurt badly.
| A．skates | B．skated |
| C．was skating | D．is skating |
Wars are disasters. A lot of people will lose their homes whenever a terrible war_____.
| A．breaks out | B．is broken out |
| C．breaks down | D．is broken down |
---I wonder ______if I park my car here.
---Of course it does. You need to find a safer place.
| A．when it minds | B．if it works |
| C．how it matters | D．whether it matters |
I will not go to bed _______I finish watching my favourite TV programme.
| A．since | B．until | C．after | D．when |
If we don’t study hard, we will ______in our class.
| A．take the lead | B．be the first |
| C．fall behind | D．be successful |