—What a nice camera!—Yeah. It _______ Beijing.
The math problem is so hard. I really don’t know________.
We played badminton ______ Sunday afternoon.
–Have you ever ________ an amusement park?--Yes, I have.I ________ Fun Times Amusement Park last year.
–Have you finished your homework yet?--Yes, I ________ it twenty minutes ago.
What a nice day! You should go sightseeing ___________ watching TV at home.