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What can I do for you What are you doing How about the sweater Can you help me
for: at at; for to; for for; to
do morning exercise do morning exercises doing morning exercise doing morning exercises .
is, exercise is, exercises are, exercise are, exercises
What can I do for you What are you doing How about the sweater Can you help me
No way That’s it Not at all It’s a good idea
What can I do for you What are you doing How about the sweater Can you help me
was doing did is doing would do
for; with to; to with; to at; with
at eight yesterday morning yesterday morning eight yesterday morning at eight by eight yesterday morning
was, doing are, doing is, doing were, doing
Do；exercise is Do；exercises is Doing；exercises are Doing；exercises is
was doing did is doing would do
is good at is good for are good at are good for
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