题目内容
My parents have absolute trust in my sisters and me. They' ve never interfered with or ______on our friends.
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Before the advent of ______ fibers, people had to rely entirely on natural products for makingfabrics.
Once you have had the disease you are _______ from it for the rest of your life.
To survive in the intense trade competition between countries, we must _______ the qualitiesand varieties of products we make to the world market demand.
With so many areas of woodland being cut down, a lot of wildlife is losing its natural _______.
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