用所给词的适当形式填空。

1. I like dolphins, but my father likes_____________ (kangaroo).

2. Kate went to the zoo with her brother _____________ (happy).

3. He____________to you if he has time. (write)

4. I think I am old enough to decide what ____________ (do).

5. A t the _________, he knew little about animals.(begin)

6. People can use tigers' bones to make __________(medical)

7.  ________, we lost the match in the end. (sad)

8. Hunters will make a lot of money if they sell __________ tusks.(elephant)

9. Would you please _______ me around your school?(show)

10.Did you have a good time _______ in the park?(play)

认真算一算。

1元-3角=（    ）角   

46元-18元=（    ）元   

5元4角+3元9角=（    ）元（    ）角   

9元1角-3元7角=（    ）元（    ）角  

2角3分+9分=（    ）角（    ）分