This visit will greatly________our understanding of your great country.

A．add up to                                           B．add up 

C．add to                                               D．add in

You’d better ______ your score and see if you have passed the exam.

A．add up to         B．add to            C．add up            D．add in

You’d better________ your scores and see if you have passed the exam.

We need to develop our imagination and ________ art ________ our teaching.

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We need to develop our imagination and ________ art ________ our teaching.

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