Question

My grandfather spends most of his time _______ because he loves nature.

A．outdoor

B．outdoors

C．indoor

D．indoors

Answer 1

B

解析试题分析：词义辨析。A adj户外的；B adv 在户外 C adj 室内的；D adv 在户外。句意：爷爷大部分时间都在户外度过，因为他喜欢自然。副词Outdoors修饰动词短语spend most of his time.故B正确。
考点：词义词性辨析
点评：形容词修饰名词；副词做状语修饰动词，形容词，这个用法是考试的重点内容。