It is in the descending portion of the ___________ that the secretions from the liver, gallbladder, and pancreas are mixed with the chyme.

单选题

It is in the ___________ that filtration occurs.

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单选题

It is the first time that she ( )the second prize in the English speaking contest.

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单选题

There are three salivary glands, the largest is called the ____________ because it is located in front of the ear.

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单选题

This brand of wine is in short ________ at the moment, so it is very expensive.

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单选题

Our house is the most（ ）one in the street;it’s painted red.

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