Let’s go hiking _____staying at home, shall we? —A good idea.[ ]

Jackie Chan has donated ______ dollars to charity. –He is an example to us all.

____ UFO landed on Center Park and ______ alien got out of _______ UFO.

People are really ______________ on the beach in summer (夏季).

You’d better work in your hometown and then you can ________ your old father.