Environment(环境) is very________，but you don’t understand the_______ of it，you always drop litter everywhere．
| A．important，important | B．important，importance |
| C．importance，importance | D．importance，important |
-Let’s __________the subway to the park.
- That _________ good.
| A．ride; sound | B．take; sounds |
| C．by; sounds | D．taking; is sound |
-Can you join the ________ club?
-Yes. I can swim very ___________.
| A．swimming; well | B．swim; good | C．swiming, well | D．swims; good |
-Could you help me carry the box?
-__________________.
| A．No, I couldn’t | B．You’re welcome. |
| C．No problem | D．That’s OK. |
Don’t________the window. It’s ________outside.
| A．opening; wind | B．open; windy |
| C．opens; wind | D．to open; windy |
The boy often _________basketball after school. But now he _________piano.
| A．plays; is playing the | B．play the; plays |
| C．is playing the; is playing | D．plays the; is playing |