Я понял, нужно заполнить пропуски в предложениях, используя правильные формы глагола "to be" (am, is, are) в утвердительной и отрицательной форме. Начнем!
Tokyo __ a city. It ____ a country.
A feather __ heavy. It ____ light.
Winters __ cold in Canada. They ____ hot.
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