I will go to HongKong for a meeting next summer.
Betty is in front of me,so I am ________Betty.
There’s______old pencil on the book. The pencil is _____pencil.
--_______students are there in your class,Mr Li? --Fifty.
---How’s your mum?---She’s ________.
---What color_____ the cats?---I think ________white and black.