Задание 31 из ЕГЭ по английскому языку: задача 262

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The research team, at Indiana State University, conducted tests on ten young volunteers aged between six to eight years. The kids played with specially adapted toys and teddy bears that had been __________ with steel blocks to increase their weight by one-and-a-half kilograms. The children were oblivious to the fact the toys were heavier and burnt more calories than other children playing with regular toys. The research may lead to a revolution in how kids exercise and simultaneously increase the biceps of parents who tidy up after their children.

1. inserted
2. inspected
3. insisted
4. inspired