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中小学英语习题：时态(一)
感谢您能抽出几分钟时间来参加本次答题，现在我们就马上开始吧！
Nobody ____ how to run this machines.【单选】
____ your mother ____ some cleaning on Sundays.【单选】
Tom was __(able) to ride a bike when he was five years old.
Yesterday Jim and his friends ____(fly) kites in the park.
Jim ____(give) a gift to his friend just now.
