Контрольные задания > 20 Mysterious places in Russia. It __________ to be about 4.2 billion years old whereas our planet is about 4.75 billion years old. (BELIEVE)
Вопрос:
20 Mysterious places in Russia. It __________ to be about 4.2 billion years old whereas our planet is about 4.75 billion years old. (BELIEVE)