Question

【题目】There is no simple answer, ______ is often the case in science.

A．as B．that C．when D．where

Answer 1

【答案】A

【解析】本题考查as引导的非限制性定语从句。that不可以引导非限制性定语从句；而when和where引导定语从句时不作主语。句意：没有简单的答案，正如科学界的许多情况一样。