Without the air to hold some of the sun's heat, the earth at night _________,too cold for us to live.
He has ______ friends.He always keeps himself alone at home.
Supposing someone__________ you had been lying, what would you do?
The reason __________he gave for not coming to your birthday party is _________his mother was ill.
Nowadays, many people________about eating habits _________what they believe.
——What a pity! The tickets for the football match have been sold out. ——Don’t worry. You can watch__________on TV.