Question
The continuous cycling of water among _______ three
forms _________ the total amount of water on the earth constant even when the whole world is using it. Each question below has two blanks, each blank indicating that something has been omitted. Choose the set of words for each blank that best fits the meaning of the sentence as whole.Solution
Water is an uncountable noun, thus here it will take singular form and thus, ITS will be used in the first blank. For the second blank, the subject is CONTINUOUS CYCLING (singular), it will take singular verb KEEPS.
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