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1、,FIRST,SECOND,THIRD,ZERO,If I am late for school,my teacher gets angry.,If I oversleep,I miss the bus.,If I miss the bus,I am late for school.,If I am late for school,my teacher gets angry.,If I go to London,I will see the Big Ben.,If I go to London,I will see the Big Ben.,If I go to Buckingham Pala
2、ce,I can take a photo of the Royal Guard.,If you go to London,you must look right before crossing a street,If I were an astronaut,I would travel in a spaceship.,If I were an astronaut,I would travel in a spaceship.,If I travelled in a spaceship,I would go to Mars.,Nice to meet you!,If I went to Mars
3、,I would meet a Martian.,If I met a Martian,I wouldnt understand him.,?,IfI aved,If I didnt understand him,I would come back to the Earth.,If I had studied hard,I would have passed my exams.,IIf you had studied hard,you wouldnt have failed your exam.,IIf you had passed your exam,you could have gone to the beach.,IIf I had gone to the beach,I would have made sand castles.,
