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--- Which do you prefer, tea____________ coffee?---Tea, please.
Work hard your dream will come true .
A．but B．and C．or D．so
Bill can swim, _______ he can’t sing.
A．but
B．and
C．or
D．so
Which is smaller, the sun _____________the moon?
A．so
B．but
D．and
Hurry up, ________ you will be late for school.
A．and
B．so
D．but