Which pair of the words with the underlined（划线的） letters has different sounds？（ ）
| A． |
thick； both |
| B． |
chess； stomach |
| C． |
bread； health |
It's too noisy here． Please ask him to the radio a little．（ ）
| A． |
turn down |
B． |
fall down |
C． |
shut down |
D． |
come down |
I my CD here and there，but I still can't find it．（ ）
| A． |
have looked for |
B． |
look for |
| C． |
will look for |
D． |
was looking for |
You must read the carefully before taking the medicine．（ ）
| A． |
news |
B． |
pictures |
| C． |
numbers |
D． |
instructions |
Miss Zhao is very helpful． She often helps us we are in trouble．（ ）
| A． |
whether |
B． |
although |
C． |
whenever |
D． |
however |
The harder we work， the result we will get．（ ）
| A． |
faster |
B． |
fewer |
C． |
better |
D． |
smaller |