求助一道高中英语冠词题
ItisaheateddiscussionamongexpertswhetherweshouldchangethedatefortheCollegeEntranceExaminationinto_____SaturdayandSundayofthefirstweekofJune,whichIthinkis_____goodadvice.
A.a;/
B.the;the
C.the;a
D.the;/
答案选D……第一个空是怎么选出来的?