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问题: 急急急~!______for computers is called computer progra

________ for computers is called computer programming.
A、To write instructions
B、The writing of instructions
为什么选B呢?A不能选么?
谢谢啦!!!

解答:

因为后面的是名词, 这是个主系表结构,所以主语也要是名词或代词.所以用动名词.