2019年mpacc考试英语真题——名词345

{01}Peter is a brilliant language leaner. Within two weeks, he has developed a good _______ of Chinese and Japanese.
A.commitment
B.description
C.transformation
D.command
解析：考察名词辨析。Commitment 承诺，保证 description 描述 transformation 转换，变形 command 命令，控制，指挥
A good command of sth 意为对……很精通 
题选D。
{02}After the explosion, the police did a lot of work to find clues from the ________．
A.on-lookers
B.viewers
C.people
D.witnesses
解析：
本题选D。