题目内容：

the purpose of mew technologies is to make life easier,____ it more difficult
Anot make Bnot to make Cnot making Ddon't make

优质解答

B
和前面的 is to make 对应.
是 is not to make 的省略is形式.
应为这两个短句是并列的,都是以is为谓语,所以后面的半句就不用再写is了.