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1, New devices have been invented to help people live a longer life by scientists.
2, If I had enough time, I could go on holiday this summer.
3, In spite of his broken leg, the man tried to save his wife.
4, If I knew the answer, I could tell you.
5, If they review them all hard, they will do the test well.
6, The villagers in the raged flood were evacuated to the safe place last night by the rescue workers.
7, Aids will be provided for homeless people by the students tomorrow.
8, If the people protect the environment now, it will be nice.
9, If they had a map, they would get lost.
10, Many houses in this village were destroyed by the storm last week.