11.The scientist didn’t mind ______ and went on with his investigation.

A.laughing at B. to be laughed at

C. being laughed at D. laughed at

12.Mr. Baker sent his son to the doctor _____ an X-ray check.

A.gives B. to give

C. being given D. to be given

13.Mother warned _______ the electric lamp.

A.not to touch B. him not to touch

C. him not touching D. him not to touch

14._______ is one of good properties of this metal.

A.light in weight B. Having been light in weight

C. Be light in weight D. Being light in weight

15.He gave no opinion about the matter because he didn’t want to risk _______ in it.

A.to involve B. being involved

C. to be involved D. involving

答案：11-15 CBBDB

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