---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. worring
D. from worrying
网友回答
A. to have worried
B. to worry
(答案→)C. worring
D. from worrying
解析：考查非谓语动词。quit“放弃，停止”，quit doing sth.“停止做某事”。故选C。