IT took me only a few seconds to send all the e-mails.(保持原句意思）I __英语解答

IT took me only a few seconds to send all the e-mails.(保持原句意思）
I ______ only a few seconds _______ all the e-mails.
第二个空格填send 为何错?为啥要用on?

人气：420 ℃　时间：2020-01-29 23:55:02

解答

因为 spend···on ······
或者是spend······（in）doing