单项选择题

They all study hard but she studies the hardest __________.

A．all
B．of all
C．in all
D．all in all
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单项选择题
__________ his work, he would do it till it was finished.
A．Once Charles would start
B．Once Charles started
C．Since Charles would start
D．Since Charles started
单项选择题
Will you join me in a walk I'll __________.
A．glad
B．be glad
C．be glad to
D．glad to
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