问题
选择题
A:Do you know for advice when we have problems.
B:You can talk to your parents or teachers.
A．who to talk
B．when to talk to
C．who to talk to
D．who can we talk to
答案
C
题目分析：考查特殊句式。句意：你知道当我们有困难跟谁寻求帮助吗？你可以跟父母或者老师。考查特殊疑问词+不定式做know的宾语，talk to sb 与某人交谈，所以选C项。