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A true friend will never ________ from you when you're in trouble.
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Everyone was_________when they heard the________news.
1年前
温室效应会导致全球升温,温室气体中最主要的成分是______,太阳出来了,草叶上晶莹的露珠不见了,这是______现象(填物态变化的名称)
1年前
A: Have you heard of a big fire on May Day? B: Not yet. When and where did the fire happen?
1年前
1年前