In order to jump, your body changes the chemical energy ________ in the food you have eaten into mechanical energy.
There are five pairs _________, but I’m at a loss which to buy.
.It’s ____ so easy as you imagine.
_________ going to the exhibition.
.______ I admit that there are still some problems about the traffic in this area, I don’t mean that it can’t be solved.
--I’m going to the post office. --_____you're there, can you get me some postcards?