选词填空（只填序号即可）。
A. days   B. day   C. is   D. on   E. are
【小题1】What _____ is it?
【小题2】How many _____ are there in a week?
【小题3】He’s wearing shorts _____ Saturday morning.
【小题4】It _____ Monday.
【小题5】There _____ seven days.