Lookoutofthewindow.(改为否定句)
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—Howmanycomputers_____inyourclassroom?
—Therearetwo.
to，I，put，the，ball，in，the，box，want
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Thereare_____studentsinourclass.Thatis19boysand21girls。
()____acat.
()Whoseglovesarethey?____my_____.
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