单项选择题

It was not until the headmaster came ______.

A. and so the students got down to work
B. did the students get down to work
C. that the students got down to work
D. then the students got down to work

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单项选择题

As far as I am concerned，education is about learning and the more you learn，______．

A．the more for life are you equipped
B．the more equipped for life you are
C．the more life you are equipped for
D．you are equipped the more for life

单项选择题

A library with 5000 books ______ to the school as a gift.

A. is offered
B. has offered
C. are offered
D. have offered