( )you ( )an e-mail to your teacher?Yes,I sent last Monday.为什么要用现在完成时?不能用一般过去时?_______you________ an e-mail to your teacher?Yes,I sent______last Monday.A.Have; written; one B.Have; sent; one C.Did; send; one为什

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( )you ( )an e-mail to your teacher?Yes,I sent last Monday.为什么要用现在完成时?
不能用一般过去时?
_______you________ an e-mail to your teacher?Yes,I sent______last Monday.
A.Have; written; one B.Have; sent; one C.Did; send; one
为什么选B,不能选C。如果选C,

Have,sent
因为是问到现在给没给老师发电子邮件,即发电子邮件的事情是过去做的,但不知道现在发没发,所以对现在有影响.