---Do you make these flowers ___? ---Oh, no. in fact, they are made by machine.
Must we sweep the floor right now? No, you _______. You can do it later.
Excuse me, may I ask you some questions, Jane? OK, _______.
To fight SARS, we should ______ animals.
Did you give up ?Yes. I know smoking may cancer.
too many candies is bad your teeth.