--- Look, Mr Green is on the other side of the street. --- It _____ be him.He has gone to London on business.
It took the firemen six hours to________ the fire.
—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.