We are going to stay there for ______ hour.
— 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