单项选择题

— ____________ should I take the medicine— Three times a day.

A．How many pills
B．How much
C．How often
D．How many
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单项选择题
It was not until 1920 ____________ regular radio broadcasts began.
A．when
B．which
C．that
D．since
单项选择题
—Would you ____________ me ____________ to carry the box upstairs—With pleasure.
A．give... favor
B．do... the favor
C．do... favor
D．give... the favor
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