There are over 58000 rocky objects in ______space,about 900 of which could fall down onto ______ earth.
Students are always interested in finding out _______ they can go with a new teacher.
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.