Fill in the blanks with an appropriate form of the verb. This grammar worksheet is for students of classes 9 and 10 and tests their ability to use different tense forms correctly.

The Dutch and their ancestors ……………1…………… (are working /have been working / were working) to hold back and reclaim land from the North Sea for over 2000 years. The first dykes to hold back the water…………2…………… (are / were / have been) built over 2000 years ago. In 1287 the dykes that held back the North Sea ……………3………… (fails / failed / had failed), and water flooded the country. For the next few centuries, the Dutch worked to slowly push back the water, ……………4…………. (built / build / building) dykes and creating polders (the term used to describe any piece of land reclaimed from water).

Once dykes ……………5………… (are building / were building/ are built), canals and pumps are used to drain the land and to keep it dry. From the 1200s, windmills had been used to pump excess water off the fertile soil; today most of the windmills …………6………….. (were replaced / have replaced / have been replaced) with electricity- and diesel-driven pumps. Then, storms and floods of 1916 …………7……………. (provides / provided / have provided) the impetus for the Dutch to start a major project to reclaim the lost lands.

Answers

The Dutch and their ancestors have been working to hold back and reclaim land from the North Sea for over 2000 years. The first dykes to hold back the water were built over 2000 years ago. In 1287 the dykes that held back the North Sea failed, and water flooded the country. For the next few centuries, the Dutch worked to slowly push back the water, building dykes and creating polders (the term used to describe any piece of land reclaimed from water).

Once dykes are built, canals and pumps are used to drain the land and to keep it dry. From the 1200s, windmills had been used to pump excess water off the fertile soil; today most of the windmills have been replaced with electricity- and diesel-driven pumps. Then, storms and floods of 1916 provided the impetus for the Dutch to start a major project to reclaim the lost lands.

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