____ you eat the correct foods ____ be able to keep fit and stay healthy. [ ]

I`m watching TV_______ my mother is cooking in the kitchen.

The last time they had great fun was_________ they were leaving college[ ]

Children should learn to _____, but they are too selfish (自私) and don’t want to play their own toys withothers. [ ]

t believe what you said, but if you can prove it, you may be able to __-me.