用所给形式填空。( 15分)
His feet are           ( big ) than yours.
We        (see) elephants in the zoo last week.
The elephant is much             (strong ) than the dog.
Amy often           (buy ) a card for her teacher on Teachers’ Day.
He can           (play) the guitar.         
---What are you doing, Tom?  ---I’m          ( read ) books.
I will              (play) basketball with my friends tomorrow.
We         (go) swimming tomorrow.
They want          (eat) apples.
---How much        (be) the bananas?  ---32 yuan.