In fact fuels we burn and plant food we eat ________ their chemical energy in the form of heat.

We will have two family parties this autumn. One is at Halloween and _________is at Thanksgiving.

He got up very early and hurried to the station，only ______ his train was cancelled.

We hope one day all the violence and poverty will be___________ in the whole world and we can live a really harmonious life.

Let’s play football. -____