题目内容

It is difficult to ____(keep track of / recognize) all the new discoveries in modern medicine.

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That guy ____(turned out / turned down) to be Maria’s second cousin.

Sorry, I’m going to be late. The ____(traffic / pollution) is really bad today. It must be rush hour.

I want to go ____(downtown / intersection) and do some shopping. All the best shops are there.

Emily will meet me at the ____(downtown / intersection) of Oak and Elm Street.