﹣﹣﹣We should try to devote(献身于)ourselves to our country like Yuan Longping.
﹣﹣﹣I think so.He still worked on the research into agriculture(农业)at the age of _________.( )
eighties
eightieth
eighty
eighty﹣year﹣old
My good friend, Lily, ______ to see me next month.( )
came
come
comes
will come
What were you doing at nine o'clock last night?
______.( )
I take a shower
I took a shower
I was taking a shower
I am taking a shower
We have two math classes ______ Tuesday morning.( )
in
on
of
at
I think it's useful for you ______ a second language.( )
learn
to learn
learning
to learning
My bike was broken. It ______ me two hours to walk home.( )
cost
spent
took
paid