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A number of scientists found genes in the 18th and 19th centuries. Scientific discoveries were made one after another in the 18th and 19th centuries. Many scientists succeeded in finding out how the features of living things were passed on to the next generation in the 18th and 19th centuries. It took a long time for scientists to find out why members of the same family look like each other.
many of his songs many of whose songs many of which songs and many of whose songs
a, the, the the, a, the a, the, 不填 a, a, 不填
remaining to settle remained settling remaining to be settled remained to be settled
remaining to settle remained settling remaining to be settled remained to be settled
How often How soon How long How many
How often How soon How long How many
Without being invited Not be invited Be not invited Not having been invited
many of his songs many of whose songs many of which songs and many of whose songs
Without being invited Not be invited Be not invited Not having been invited
looked around at looked up at looked forward to looked back on
remaining to settle remained settling remaining to be settled remained to be settled
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