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Water, ________ enough, can change into vapor quickly.

[  ]
A.

when is heated

B.

while heating

C.

when to be heated

D.

when heated

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There was a sudden rise in the water and the calf was washed clean over the mother’s body and was gone. Ma Shwe turned quickly to reach it and pressed the calf with her head and trunk against the rocky bank. Then with a huge effort, she picked it up in her trunk and tried until she was able to place it on a narrow shelf of rock.

Just at this moment, she fell back into the river. If she were carried down, it would be certain death. I knew, as well as she did, that there was one spot where she could get up the bank, but it was on the other side from where she had put her calf.

While I was wondering what I could do next, I heard the sound of a mother’s love. Ma Shwe had crossed the river and got up the bank and was making her way back as fast as she could, roaring(吼叫) all the time, but to her calf it was music.

The moment the author got down to the river bank he saw ___.

 the calf was about to fall into the river

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How did Ma Shwe manage to save her calf from the fast-flowing water?

By putting it on a safe spot.

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By taking it away with her

By carrying it on her back.

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It was a sign of danger.

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It was a musical note.

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