问题
选择题
_____ they decide whichcollege to go to, students should research the admissionprocedures. [ ]
A. As
B.While
C.Until
D.Once
答案
答案：D
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_____ they decide whichcollege to go to, students should research the admissionprocedures. [ ]
A. As
B.While
C.Until
D.Once
答案：D