A gap at the Joint of the railway lines is____ ( leave / left / leaving ) in order to allow the rails to expand when heated. If an allowance is not _____(make / making / made ) for expansion, an accident may be _____( caused / caused / causing ).
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4
Answer:
left
made
caused
Explanation:
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Answered by
5
Answer:
1.left
2.made
3.caused
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