填上下列算式中所缺的数字。(10’) (1)four + two = _____________ (2)seven + __________ = eight (3)ten - five = ___________ (4)_________ + three = nine (5)_________ - three = one
根据要求改写句子。
(1) I like swimming in summer. (改为否定句)
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(2) This is an orange sweater. (改为复数句)
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