Question

Microblog is a platform ________ people can express their thoughts, show their daily life and communicate with each other by sending post.

A．what

B．which

C．where

D．when

Answer 1

C

考查定语从句的引导词。分析句子结构可知，此处platform表示地点“平台”，故引导词用where，在从句中作状语，相当于on which。