It's ______ good idea to visit our old t
题型：选择题
问题：
It's ______ good idea to visit our old teachers on ______ Teachers' Day. [ ]
A. a; the
B. a; /
C. /; /
D. /; the
It's ______ good idea to visit our old teachers on ______ Teachers' Day. [ ]
A. a; the
B. a; /
C. /; /
D. /; the