Tom speaks Chinese very well. Who teaches him?— He studies by __________.

Things made by hand are usually more expensive than _ produced in factories.

Melody has a great interest in planting flowers, but her sister ______. She can’t even stay in the garden for one minute.

We_______ each other the best of luck in the examination.

Let’s look at the bag. Can you see _____“s” on the corner of_____ bag?