we witnessed a man-made satellite ____________(launch) into

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we witnessed a man-made satellite ____________(launch) into the outer space
填什么,具体分析下

launched
表被动,完成的过去分词做宾补
再问：你这是过去式吗
再答：不是，是过去分词，表被动，完成
再问：但这是过去进行时的被动语态
再答：也可以呀！那样的话， a man-made satellite 【was being launched】 into the outer space这部分就是宾语从句了。

我以为只能填一词，那样就只能是launched过去分词

we witnessed a man-made satellite ____________(launch) into we have launched another man—made satellite, we have launched another man -made satellite,---is announced We use a () to lift man-made satellites into space. 1.When ___ the first man made satellite ___(send) up into sp China will s_____ another man made satellite up into the spa has another man-made satellite been sent up into space by th ___they ____ up another man-made satellite into space last w 英语翻译Man-made satellites ____________ into space by many coun china ______(launch) a satellite for india next month Another Chinese man-made earth satellite was reported to () china has sent up another man made satellite,___was announce