2019年mpacc考试英语真题——名词548

{01}They received a number of _____ from customers about the lack of parking facilities.

A.complains

B.complaints

C.complainer

D.complainers

解析：句意：他们收到了许多来自顾客的抱怨关于缺乏停车设备。名词，抱怨complaint，题中a number of 修饰可数名词复数，所以选B。
本题选B。
{02}. To our ______, the result of the experiment is much better than we expected.

A.regrets

B.relief

C.disappointment

D.sorrow

解析：本题的含义是令我们感到安慰的是实验的结果比我们期盼的要好的多，relief表示安慰的意思，故本题选B。
本题选B。
{03}No one has yet succeeded in solving the _____ of how life first began.

A.biology

B.gravity

C.puzzle

D.theory

解析：略
本题选C。