Students must learn the ____________ courses well before they can continue the advancedones.
A. basis
B. based
C. base
D. basic
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Hurry up! _________ we'll miss the bus.
A. So
B. Otherwise
C. But
D. Because
His last year’s trousers are now outgrown and need (length) ____ a little.
We find it hard to stand him any longer; he behaves so (change) ____.
Susan’s parents insist that she (return)____ home before nine o’clock at night.
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