2019年mpacc考试英语真题——名词30

{01}Through a number of experiments, Marie Curie found a new chemical ________ -Radium(镭), which is later widely used for cancer treatment．
A.substance
B.matter
C.object
D.thing
解析：
本题选A。
{02}The idea that China has been in the first ________ of world powers is more or less subjective．
A.rate
B.rank
C.stage
D.pace
解析：
本题选B。