Don’t worry if you don’t understand everything, The teacher will ______ the main points at the end.

—Look, John‘s fallen asleep at work!—Oh, he must have ________ late last night.

The party was meant to be a surprise to everyone who would take part, but one of the organizers _______ the plan．

He is always______fault with other people though he doesn’t do his own work properly.

(2013·哈尔滨四校高三统一检测)In fact fuels we burn and plant food we eat ________ their chemical energy in the form of heat.