1) Young Albert Einstein __ hours playing his violin. a) spent b) had spent c) has spent 2) Marie Curie __ tirelessly in her laboratory for years. a) has worked b) was working c) had worked 3) Now the genetic basis of genius ___ actively by researchers worldwide. a) is investigated b) is being investigated c) has been investigated 4) His latest findings __in a prestigious scientific journal last month. a) have been published b) will have been published c) were published 5) By the age of five, the child prodigy __several complex mathematical problems. a) has already solved b) already solved c) had already solved 6) Currently, researchers ___ the genetic basis of exceptional intelligence. a) are investigating b) were investigating c) investigated 7) Throughout history, many geniuses __ misunderstood and underappreciated. a) have been b) has been c) had been d) are 8) For centuries, people __about the nature of genius. a) wondered b) have wondered c) are wondering 9) New methods for identifying gifted children ___ in schools soon. a) will be implemented b) would be implemented c) are implemented d) have been implemented 10) New educational programs __ to support gifted learners. a) were designed b) have been designed c) are designed d) will be designed

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