Birds"singing is sometimes a warning to other birds________away.A．stayingB．staye

题型：不详难度：来源：

Birds"singing is sometimes a warning to other birds________away.

A．staying

B．stayed

C．stay

D．to stay

答案

D

解析

试题分析：句意：鸟的叫声有时是警告其他的鸟要离开。因为该句已经有系动词，故不缺少谓语动词，排除C；warning是抽象名词，它的后面常用不定式作定语，故选D。
点评：本题难度适中。非谓语动词是高中阶段的重难点之一，内容多又杂，不容易理解，需要考生有分析理解复杂的句子结构的能力。题目的设置注重了情景化和结构复杂化，加大了考生对题干句的理解难度。设问的角度呈现出多样化趋势，不仅仅是非谓语间的互相干扰。
即学即练：The old man sat in front of the television every evening, happy _______anything that happened to be on.
A. to watch               B. watching    C. watched        D. to have watched
解析：A。动词不定式短语作原因状语。句意：那位老大爷每天晚上坐在电视机前，非常开心地观看即将上映的任何节目。“happy ____anything that happened to be on.”作目的状语。