—When did you ________ to do the work? —Two months ago, we are through 80% of it at the moment.
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.
-- Where are the_____?-- They are on the desk.