（ ）I'm afraid I won't be able to keep our _____ on Monday.A appointB appointsC appointmentsD sppointment

（ ）I'm afraid I won't be able to keep our _____ on Monday.
A appoint
B appoints
C appointments
D sppointment

C
A和B（单三）是动词,D没有这样的单词

a

C