—What were you doing at this time yesterday?—We _______ in the classroom.
We can’t go swimming ________ our parents are with us.
if
when
unless
—Billy used to be shy and quiet, but he is very outgoing now.
—Yes. We are all ________ at his changes.
surprise
surprised
surprising
—Who got the first prize in this competition?
—Of course Tom did. He worked ________ among us.
hard
harder
hardest
—There is going to be the ________ Art Festival next week.
—Great. We can enjoy some beautiful paintings again.
two
first
second
We can go to school ________ bike to make our city greener.
by
on
in