Question

My father warned me      going to the West Coast because it was crowded with tourists.

A．by

B．on

C．for

D．against

Answer 1

D

句意：我父亲警告我不要去西海岸, 因为那里挤满了游客。句中谓语动词warned和介词against搭配, 构成warn sb. against doing sth. 相当于warn sb. not to do sth, 意思是 “警告某人不要干某事”。