Question

12. ―Tom is so worried about the test that he said he was going to study all night.

―Tell him he should quit    and get some help.

A. to have worried    B. to worry

C. worrying        D. from worrying

Answer 1

12.   C 考查非谓语动词。此处quit doing sth相当于stop doing sth ，意为"停止做某事"。