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
will the match between HAS and BIG be held？﹣In our school stadium．（ ）
| A． |
When |
B． |
Where |
C． |
Why |
D． |
How |
It might be cool in the evening．You\d better take a（n） ．（ ）
| A． |
umbrella |
B． |
sweater |
C． |
wallet |
D． |
camera |
Don't ride too fast，David． the risk of an accident．（ ）
| A． |
Take away |
B． |
Write about |
| C． |
Think about |
D． |
Try out |
Tom and Jerry are very funny．I can't help when I watch them．（ ）
| A． |
singing |
B． |
laughing |
C． |
sleeping |
D． |
talking |
Lucy is very young， she can live on her own．（ ）
| A． |
and |
B． |
or |
C． |
so |
D． |
but |