下列各句中均有一处错误，指出并改正。
(1) (2018•全国Ⅰ)They also had a small pond, which they raised fish.
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(2) (2017•全国Ⅱ)In their spare time, they are interested in planting vegetables in their garden, that is on the rooftop of their house.
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(3) (2017•全国Ⅲ)Around me in the picture are the things they were very important in my life at that time: car magazines and musical instruments.
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(4)(2017•全国Ⅲ阅读改编)The Newcastle team are developing in-vehicle technologies for older drivers who they hope could help them to continue driving into later life.
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(5) (2018•全国Ⅰ阅读改编)The median number(中位数) of speakers is a mere 6,000, it means that half the worlds languages are spoken by fewer people than that.
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(6)(2017•全国Ⅱ阅读改编)Charles Darwin, over 150 years ago, imagined a world far busier, noisier and more intimate(亲密的) than the world where we can see and hear.
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(7) (2018•全国Ⅱ阅读改编)Many of us love July because it’s the month on which nature’s berries and stone fruits are in abundance.
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(8) (2018•全国Ⅱ阅读改编）Experts say it’s an invaluable social practice that it results in big benefits.
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