The traffic is terribly busy in the morning. You'd better avoid in the center of the city.( )
A.driveB.drivingC.to driveD.driven
It was for us to solve the math problem, few of us could even understand it.( )
easy enough
enough easy
difficult enough
enough difficult
There is a knock at the door. It my mom. It's time for her to be back home.( )
may be
may not be
must be
mustn't be
The children here improve their English listening and speaking every day.( )
on
through
with
by
Have you seen my mobile phone, Sam? I can't find it .( )
everywhere
somewhere
nowhere
anywhere
While Mike computer games in his room, his dad came in.( )
is playing
was playing
will play
plays