2019年mpacc考试英语真题——名词881

{01}Animals should not be locked in cages; they should be in their normal _____.

A.environment

B.position

C.residence

D.dwelling

解析：　environment(="surroundings," circumstances)环境，environment作集合名词用时，只用单数形式：We should work hard to improve our environment. (单词，不可数)Children need a happy home environment. (单数，可数)
本题选A。
{02} Professor Jordon is well known for his _____ into the habits of the common housefly.

A.examination

B.introduction

C.research

D.expression

解析：　　research into对...研究：1)(作动词用)He is researching into the reading problems of young school children.2)（作名词用）to carry out a research(="some" research)into the causes of brain damage.(对大脑损伤原因进行研究)。研究可译为make researches into, make a study of 或直接用动词study vt或research into (a problem etc.).
本题选C。