【題目】Recent years have w the rapid development of Artificial Intelligence.

【答案】witnessed
【解析】句意：最近幾年見證了人工智能的迅速發(fā)展。witness動詞”目睹，見證“；本句的主語是recent years近年，通常與現(xiàn)在完成時連用。故填witnessed。

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