Question

【题目】If you have any problems, you can ask Dr. Know-all _________ help.
A.at
B.on
C.for
D.with

Answer 1

【答案】C
【解析】句意：如果你有问题，你可以向Dr. Know-all寻求帮助。根据句意“向……寻求帮助”是ask sb. for help，所以答案是C。