Joining a summer camp is a great chance _______ free time with your friends．（ ）
| A． |
spend |
B． |
spending |
C． |
to spend |
Many parents have to ________ early to make breakfast for their kids．（ ）
| A． |
get up |
B． |
stay up |
C． |
give up |
﹣﹣I wonder ________．
﹣﹣It's about an unusual experience of a little girl．（ ）
| A． |
who wrote the book |
| B． |
what the book is about |
| C． |
how I can get the book |
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 |