________ it is expected that students co
题型：选择题
问题：
________ it is expected that students come to college with the ability to solve most problems in their study by themselves , this is not always the case.
A．When
B．While
C．For
D．As
________ it is expected that students come to college with the ability to solve most problems in their study by themselves , this is not always the case.
A．When
B．While
C．For
D．As