Most people advise that students’ heavy burden __________.
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A
reduce
B
be reduced
C
to be reduced
D
reduced
推荐题目
I was really anxious about you. You _____ __ home without a word. 
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A
mustn’t leave
B
shouldn’t have left
C
couldn’t have left
D
needn’t leave
 Look at the clock! It's time ______ work.
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A
we started
B
we'll start
C
we're starting
D
we have started
They enjoyed fresh watermelon last fall because they______ watermelon seeds in the spring. 
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A
were planting
B
would plant
C
have planted
D
had planted