--- Let’s go to play football, shall we? --- Sorry, I can’t. I must go over the points the teacher explained ______ I forget them.
The stars who advertise some false medicine _____ for the deaths caused by the medicine.
The pilot asked all the passengers on board to remain________ as the plane was making a landing.
______ a piece of ice outside in such hot weather, and you’ll soon find it melt.
______ it is to listen to music when you are free.
—What are you going to do this weekend? —_______. If time permits, I may go to Shanghai with my friends.