问题
选择题
There is a shortage of teachers in Western China, and it will fall on the 80s and 90s generations to this responsibility.
A．take on
B．step up
C．make up
D．apply for
答案
答案：A
题目分析：句意：在中国西部缺少教师，承担这个责任会落在80后和90后的身上。四个选项的意思分别是：A. take on承担，雇佣，呈现，B. step up加紧，C. make up 组成，化妆，弥补，D. apply for申请，应用，根据句意选A。