Question

【题目】It is obvious to the students____ they should get well prepared for their future

A. as

B. which

C. whether

D. that

Answer 1

【答案】 D

【解析】句意：显然，学生们应该为他他们的未来做好充分的准备。that引导主语从句，在从句中不作句子成分，it是形式主语。as引导定语从句或状语从句；which哪个（些），引导名词性从句时要在从句中作成分；whether是否。