________giving a general introduction to computers, the course also teaches how to use them.

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问题 ________giving a general introduction to computers, the course also teaches how to use them.

选项 A、On behalf of
B、In addition to
C、In exchange for
D、As for

答案B

解析 on behalf of：代表(或代替)，因为，为帮助；in addition to：除……以外(还)；in exchange for：作为交换；as for：至于。根据句意可知，选B。

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