Tenses Worksheet For Class 10 | Gap Filling Exercise
Fill in the blanks with an appropriate form of the verb. Class 9 Tenses Worksheet The greenhouse effect …….1……… when man-made and natural gases …….2…….. on earth enter the atmosphere and trap energy from the sun, …….3……. the planet’s surface temperature. The major green house gases ……..4…… carbon dioxide, methane, water vapour and nitrous oxide. …
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