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________ with the size of the whole earth, the biggest ocean does not seem big at all.

In the London Olympic Games Badminton Men 's singles final, Lin Dan won the gold medal, becoming the first  ____________ the championship.

Charlie Chaplin is considered ________ a great contribution to the film industry.

_________ their final medical check, the astronauts boarded their spacecraft.

If _______, I’ll show the committee what I have found out about the matter.

–A boy was killed by the tiger in the zoo.
–He was believed ______ into the cage while feeding the tiger without permission.

–It is snowing heavily again in the north of China and the farmers suffer great loss.
–______ to people in the north, we’re lucky without a cold winter.

He hurried to the booking office only _____ that all the tickets had been sold out.

It was so cold that they had the fire _____ all night.

More highways have been built in China, _____ it much easier for people to travel from one place to another.