There are so many foggy days recently.We all wonder_________.( )
A.how is the air polluted
B.why the air is seriously polluted
C.what can we do to prevent that bad weather
D.what are the real reasons
Our classroom won't be clean _____we clean it every day.( )
after
while
unless
because
You'd better get up_____,or you will miss the train.( )
early
slowly
quietly
carefully
Nowadays,_____birds fly to the warm south in winter.( )
million
millions
two millions
millions of
﹣Dad,I'm afraid I can't do well in my math test tomorrow.
﹣Don't worry.Believe in_____.( )
you
your
yours
yourself
Don't read in the sun. It's bad for your_____.( )
ears
eyes
arms
hands