单选题Prior to this text, the author has most probably made an analysis of ______.A brain gain in the United States.B the cause of problems of the black people.C the U. S educational programs for blacks.D the procedure of foreign students’ immigration.
题目
单选题
Prior to this text, the author has most probably made an analysis of ______.
A
brain gain in the United States.
B
the cause of problems of the black people.
C
the U. S educational programs for blacks.
D
the procedure of foreign students’ immigration.