单项选择题

______ he tried, he was unable to work out this mathematic exercise.

A．As hard
B．Hard when
C．Hard as
D．When hard
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— Is Paul playing both soccer and tennis for the school — He ______. But now he has given up playing tennis.
A．is
B．has
C．was
D．had
单项选择题
They'll take ______ trip to Jiangxi tomorrow.
A．a two-day
B．a two-days
C．a two day's
D．a two day
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