题目内容

RGB三原色分别是指()三种颜色。

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25. These devices are capable ________ performing a wide variety of tasks.

A. in
B. of
C. for
D. with

26. Many experts believe that the Internet of Things will ________ the next industrial revolution.

A. give off
B. turn on
C. bring about
D. send for

27. You should _______ some steps to help maintain a healthy indoor air environment.

A. make
B. do
C. carry
D. take

28. Believe it or not, you can find many ways to save money while ________ in an expensive area.

A. live
B. living
C. tolive
D. lived

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