Question

You didn't hand in your homework. Did you forget ______ it last night?

A.to do. B. doing.

Answer 1

为你解答。
You
didn't
hand
in
your
homework.
Did
you
forget
(A.to
do)
it
last
night?
你没交作业。你昨晚是不是忘记写了?
解释:forget
to
do，忘记要做某事。而forget
doing是忘记做过的事。这里要填的是前一种情况。