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From what we have discussed above, the (conclude) ______ we have come to is that we must take immediate measures to control the air pollution.
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When (visit) ______ a strange city, I like to have a guide-book with me.
When (visit) ______ a strange city, I like to have a guide-book with me.
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It was impossible to avoid ______ by the stormy weather.
A．being much affected
B．having much affected
C．to be much affected
D．to have been much affected
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