_______, the more exercise you do, the richer your knowledge will be.

I left my handbag on the train, but luckily someone gave it to a railway official.——How unbelievable to get it back! I mean, someone ______ it.

_________ good weather it is! Let’s go to the beach.—-It sounds _________ .

Look at these ____ animals. They often hurt people but they themselves can be___.

This kind of iPad ______ in our computer shop. It ______ very well.