单项选择题

Keep this reference book; it may come in ______ one day.

A．handy
B．useful
C．convenient
D．helpful
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单项选择题
Tim has failed three courses this semester, so he will have to ______ them next semester.
A．remake
B．repeat
C．reapply
D．revise
单项选择题
Sally was a bit shy, but the teacher found her quite ______ discussing a recent film with others.
A．at home
B．at most
C．at house
D．at heart
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