Mrs Green are very grateful to the neighbour _____helped her child out of the fire．

Somebody has left the office door open.—________.Don’t look at me.

Clean water and fresh air are essential for our daily life, _______ we can’t live.

Lily doesn’t know what she and her friends can do to help the little boy that parents have left their hometown for making money.

Do you know everyone from Class One-Er…, I know some of _______.