We have to admit that the biggest_______

问题选择题

We have to admit that the biggest___________ facing the ecosystem is limited resources and the worsening environment.

A．mission

B．challenge

C．scale

D．contribution

答案

答案：B

题目分析：考查名词辨析A任务B挑战C刻度D贡献题意为我们不得不承认面对生态最大的挑战是有限的资源与糟糕的环境。在admit 的宾语从句中 the biggest changllege 是句子的主语，谓语是is ,表语是 limited resources and the worsening environment，分析清句子结构，很容易能得出答案B项。

考点考查名词辨析