摘要： Now many children like surfing the Internet, but the same time they should know that there is something unhealthy on it. A. for; in B. at; by C. on; at D. in; on
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Now many children like surfing ___________the Internet, but ___________ the same time they should know that there is something unhealthy on it.
[
]|
A ．for; in |
B ．at; by |
|
C ．on; at |
D ．in; on |
Now many children like surfing on the Internet, but ________ the same time they should know that there is something unhealthy on it．
- A.in
- B.by
- C.at
- D.on
Now many children like surfing ________ _________ the Internet, but ________ the same time they should know that there is something unhealthy on it.
A. for;in B. at;by C. on;at D. in;on
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