You will miss the train ______ you hurry up .
A. unless
B. as
C. when
D. if
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We must hurry ,_______ we'll be late for class
A. or
B. and
C. so
D. for
Make up your mind ,________ you will miss the chance .
A. unless
B. or
C. and
D. so
Tom walked ______ that I couldn't keep step with him .
A. such fast
B. so fast
C. too fast
D. such a fast
On Sunday , my father often plays chess ______ my mother cooks meals
A. and
B. while
C. but
D. so