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Put the verbs in brackets in the correct form.
Over the past 50 years a demand for water ------------------ 1 (increase). As the world population ------------2 (grow), water supplies ----------------------- (decrease). As a result, currently many countries ----------------- 3 (work) how to solve this problem. One of the solutions is desalination, that is the process by which salt water ---------------------- 4 (convert) into drinkable fresh water. Many desalination plants all over the world --------------------- 5 (build) already, though in the nearest future they ----------------- 6 (be able) to satisfy an increasing demand for fresh water.
Put the verbs in brackets in the correct form.
Over the past 50 years a demand for water ------------------ 1 (increase). As the world population ------------2 (grow), water supplies ----------------------- (decrease). As a result, currently many countries ----------------- 3 (work) how to solve this problem. One of the solutions is desalination, that is the process by which salt water ---------------------- 4 (convert) into drinkable fresh water. Many desalination plants all over the world --------------------- 5 (build) already, though in the nearest future they ----------------- 6 (be able) to satisfy an increasing demand for fresh water.
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1 - was increased, 2 - grows, decreases, 3 - are working, 4 - converts, 5 - have been built, 6 - will be.