Li Hua is a volunteer．She will put up a sign to remind people to save every drop of water．Which of the following signs should she choose？（ ）
A．
B．
C．
D．
-Judy，why is your dog barking（吠叫）at the mirror？
-Because it can't recognize（认出）________ in the mirror.
| A． |
me |
B． |
it |
C． |
you |
D． |
itself |
The sign 
means that we must slow down and drive______ near the school.
| A． |
quietly |
B． |
quickly |
C． |
carefully |
D． |
seriously |
-As the saying goes， "The longest journey starts with a single step."
-_____________.Let's take action right now.
| A． |
No way |
B． |
You are right |
| C． |
What a pity |
D． |
I don't think so |
- Did you have a good time in Shanghai？
- Yes，come and look.My photos will show you _______________.
| A． |
how did we go there |
| B． |
where we will go |
| C． |
when did we meet |
| D． |
what the trip was like |
-Do you know where your brother is，Mark？
-Sorry.I __________ about a question and didn't hear what you had said.
| A． |
was thinking |
B． |
will think |
| C． |
am thinking |
D． |
was thought |