---Lucy, what were you doing at nine last night?---I ___________ the piano. I usually practice the piano at that time.
–Would you mind _______ the yard? –OK. I’ll do it in a minute.
–Where would you like to go on vacation? –I’d like to go _______.
–Jim, I will go to Hong Kong tomorrow. –_______
When you see some waste paper on the ground, you should _______ and put it in the trash bin.
–_______ nice day! Why not go hiking? –Great idea. Let’s go.