After reading for an hour, it’s good to ______ the green trees for a minute or two.
| A．look out of | B．look out at |
| C．look out from | D．look for at |
After reading for an hour, it’s good to ______ the green trees for a minute or two.
| A．look out of | B．look out at |
| C．look out from | D．look for at |
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