She looks very sad. I want to help her, but I just don’t know ____ to do it.
—Shall we go skating tomorrow ?—__________.
----How many students are there in your class? ---- __________ number of the students in our class __________ 40.
----Mum, can I do the homework tomorrow? ------You _______finish it today.
---How is Sandy? She stayed at home_____ the meeting last Sunday. ---- Yes. She is much better now.
Why is Simon ________ crazy _________ playing computer games?