— What do you like doing?
— I like ________ flowers.
A.to smell B.smelling
— What can you feel?
— I can feel _________ .It’s a key.
A.something hard B.hard something
What _______ you do on Sunday?
A.do B.are
_________ you free on Saturday afternoon, Tom?
A.Do B.Are
We brush our teeth at seven o’clock ________ the morning.
A.in B.at