_______ Children's Day，all the children are very happy．（ ）
A．toB．InC．On
The ________ pollution is becoming more and more serious，We haven't seen blue skies for several days．（ ）
| A． |
noise |
B． |
water |
C． |
air |
﹣﹣Do you know some robots are able to serve as waiters in restaurants？
﹣﹣Really？________ interesting it is!（ ）
| A． |
What |
B． |
What a |
C． |
How |
Steve ________ TV in the living room when his mother came in．（ ）
| A． |
was watching |
| B． |
watches |
| C． |
is watching |
﹣﹣Have you seen the movie Zootopia（疯狂动物城）？
﹣﹣Of course，I think it's ________ cartoon I have ever seen．（ ）
| A． |
funny |
| B． |
the funniest |
| C． |
funnier |
David，close the door ________，Your sister is studying for the exam．（ ）
| A． |
clearly |
B． |
easily |
C． |
quietly |