We must keep our room clean , for dirt and disease go , you know .
| A．hand in hand | B．step by step | C．from time to time | D．one after another |
相关试题
Our manager asked us to keep him _______ of what was going on there.
| A．informing | B．to be informed | C．informed | D．being informed |
The women carrying babies, come in first, ________?
| A．will you | B．will they | C．don’t they | D．don’t you |
The astronauts were so struck by ______beauty of nature that they took lots of pictures in _______space. 
21.
| A．the ; / | B．the; the | C．/; the | D．/;/ |
－Good evening, Mr. Green. I’m sorry to bother you. But it’s the fourth of December today.
－Oh, Mrs. Baxter, ________ rent! I’m sorry it’s late. I’ll write you _______ check right now.
| A．the; the | B．a; a | C．a; the | D．the; a |
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