1.Carl,why not go and help your sister water the flowers the

1.Carl,why not go and help your sister water the flowers there?
Why ___A___?I am busy myself .jack is lying on the grass doing nothing
A.me B.I C.him D.he
2.Ted’s mother kept telling Ted not to tell lies,but ____B___ didn’t help.
A.Who B.it C.she D.he
3.There is ____A __new fridge in the kitchen
A.a; B./ C.an D.The
4.Jack has studied Chinese in this school _____B___ the year of 2000
A.since B .in C.on D .by
5.All the clerks went home ____C____ Mr.Wang ,for the had to finish his work
A .except B .for C.to D.at
为什么这样选择?