--- , is this your ruler?---Yes, it is. Thank you.
—Must I clean the blackboard now? —No, you _______ clean it later.
----Can we find before an earthquake?----Yes. Some animals will run wildly and some plants will come out in the wrong season.
They___________ there last Saturday.、
We___________ win the game. The other team is not strong at all.
______ good time the children had flying kites in the park last week!