26.The time isn't far away you will have to take the College Entrance Examination.
A
that
B
when
C
until
D
while
先行词为The time，从句为you will have to take the College Entrance Examination，从句中缺时间状语，故要用关系副词when。本句意思：参加大学入学考试的时间不远了。
本题考查了间隔式定语从句。