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第1题

Infant ________ rate is the number of infants dying before reaching one year of age, per 1,000 live births ia giveyear.<
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第2题

The ______ of a cold include coughing, sneezing, a running nose, and a feeling of tired and unwell.
· sights
· sig
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第3题

He seemed very young, but __________ he was older thaall of us.
· inature
· ireality
· by nature
· iorigin
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第4题

I knocked at the door several times __________ aelderly lady came to answer it.
· before
· after
· unless
·
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