题目内容
____more attention, the trees could have gown better.()
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An _____crowd is awaiting the arrival of the film star.()
The computer center, ____last year, is very popular among the students in this school.()
____from space, the earth, with water ____about seventy percent of its surface, looks like a blue ball. ()
He is very old , _ he still works very hard .()
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