优优班--学霸训练营 > 知识点挑题
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            • 1.

              (1) ____travels much faster than sound. (2) Everybody should do something to protect the____. (3) My aunt’s daughter is____in France. (4) The ____is smaller than the earth. (5) It’s____finish the work in such a short time. It’s too difficult.
            • 2. She always does her homework ______ (小心),and we don’t like working with her.
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