例:A:Jenny often walks to school.
B:Jenny walked to school yesterday.
C:Jenny is going to walk to school tomorrow.
B:
C:
B:I brought a star for the tree yesterday.
C:
B:
C:Betty is going to help her mother tomorrow.
B:
C:
—They are going to have a party.
—______________
—They (buy) a Christmas tree first.
—She is going to __________ me.