Class2 will go for a picnic.They made___6 o'clock to meet zr the foot of Mt.Tai.A.it B.that C.them D.\

Class2 will go for a picnic.They made___6 o'clock to meet zr the foot of Mt.Tai.A.it B.that C.them D.\
Class2 will go for a picnic.They made___6 o'clock to meet zr the foot of Mt.Tai.
A.it
B.that
C.them
D.\

Class2 will go for a picnic.They made___6 o'clock to meet zr the foot of Mt.Tai.A.it B.that C.them D.\
A
决定时间的话用固定搭配it

A

A
it在此处指代之前的 a picnic

A