________ it is expected that students come to college with the ability to solve
题型:不详难度:来源:
________ 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
答案
B
解析
略
举一反三
_______environmental damage is done, it takes many years for the ecosystem to recover.