When times are difficult， tell that pain is part of growing．（ ）
| A． |
you |
B． |
yourself |
C． |
your |
D． |
yours |
Dad， I want to be a policeman in the future．
Work hard， _____ you will succeed．（ ）
A．orB．andC．but
_____ the mountain is， _____ the air is．（ ）
A．The highest， the thinnest
B．Higher， thinner
C．The higher， the thinner
It _____ me two hours to help Mary with her math last Saturday．（ ）
A．tookB．spentC．paid
It is very dangerous for us the mobile phone while crossing the street． （ ）
A．answeringB．to answerC．answer
I like _____． They are my favorite fruit．
Really？ But I like apples．（ ）
A．strawberriesB．orange
C．banana