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?

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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?

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?
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?

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?
spent on
spend on:固定搭配

spent...sending/on

I spent only a few seconds sending all the e-mails.

I spent only a few second on sending all the e-mails.
这里有一个固定搭配是spend... on doing sth.花……做……

I spent only a few seconds on sending all the e-mails.
这里有一个固定搭配是spend... on doing sth.花……(时间)做……

原句意思是:我只花了一点时间就发完所有电子邮件
用spend...on 是固定搭配,
填进去意思是:在发邮件上,我只花了一点时间。也就是原句的意思
且原句是过去式 那麽spend 改成spent。
应该填spent...on