Don't be upset.Sometimes challenges can ___________ the best in us.( )
A.bring outB.work outC.hand outD.hang out
As we know,sixteen﹣year﹣olds_____drive a car in our country.( )
must
could
mustn't
couldn't
I usually spend time_____in the library on weekends.( )
read
reading
reads
to read
Jack is quite different_____his twin brother Jeff.( )
to
for
from
with
Katie is_____of the three girls in her family.( )
young
younger
the younger
the youngest
Our classroom won't be clean _____we clean it every day.( )
after
while
unless
because