This is not an economical way to get more water; ____, it is very expensive.

What does your mother do to keep fit, Tom? —She usually ______ after supper.

Many teenagers have hobbies. But sometimes these hobbies can get ______ of schoolwork. [ ]

_____I use your dictionary, Tom?—Of course, you _______

Don’t ______, my children. Keep working on and you will be successful.—Thank you. We’ll try our best.