题目内容
Some people say that learning Chinese is a __________but fruitful experience.
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The Chinese exchange students came to visit the foreigners home and __________them on their wonderful cooking.
Americans are regarded as a very___________people all over the world because they are usually more open to diversity.
Santa Claus is a(n)__________figure beloved by many children in the Western world.
The professor was delayed in an accident but he forgot to__________the audience.
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