Class2 will go for a picnic.They made ___6 o'clockto meet at the foot of Mt.Tai.A.itB.thatC.themD.\ 为什么选A

Class2 will go for a picnic.They made ___6 o'clockto meet at the foot of Mt.Tai.A.itB.thatC.themD.\ 为什么选A
Class2 will go for a picnic.They made ___6 o'clockto meet at the foot of Mt.Tai.
A.it
B.that
C.them
D.\
为什么选A

Class2 will go for a picnic.They made ___6 o'clockto meet at the foot of Mt.Tai.A.itB.thatC.themD.\ 为什么选A
A.make it sometime表示把时间约定在...固定用it这个代词,而不用别的代词