—May I smoke here? —If you ________, choose a seat in the smoking section.
Tomorrow is Tom’s birthday. Have you got any idea _____the party is to be held?
_______ we are sure about is the need to prevent children from being spoiled.
The news _____our athletes won another gold medal was reported in yesterday’s newspaper.
It has been proved ___ eating vegetables in childhood helps to protect you against serious illnesses in later life.
As his best friend , I can make accurate guesses about ___he will do or think.