问题
选择题
The teacher told the pupils that the United States of America _____ 50 states.
A．was made of
B．made up
C．makes up
D．is made up of
答案
D
题目分析： 考查动词短语。Be made of 由。。构成；made up 构成，编造；be made up of 由。。组成。句意：考查告诉学生们，美国由50个州组成。根据句意选D项。
考点 : 考查动词短语
