There are many _______ playing onthe playground.

. — May I play computer games now, mum— No, you _______. You haven’t finished your homework yet.

The door opened and _____ a middle-aged woman with fashionable clothes. [ ]

192. You are only allowed to take less than30 kilograms of carry-on__________onto a plane.

gh the causes of cancer ____, we do not yet have any practicalway to prevent it.