Question

You’d better make a mark ______ you have any questions.

A．at which

B．at where

C．the place

D．where

Answer 1

D

试题分析：句意：你最好在有疑问的地方做个标记。考查地点状语从句。所以用where引导。如果加上at可以改成 at a/the place where ，where 在这儿引导的定语从句。place 做了at的宾语。