A. Is, are       
B. Is, is       
C. Are, are 

1. there, a forest, the park, Is, in (?)
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2. there, Yes, is (, .)
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3. a, river, there, Is (?)
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4. No, isn't, there (, .) 
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(     ) 1. A. There are three birds in the tree.
　　　  B. The birds are in the tree.
　　　  C. I have three birds.
(     ) 2. A. I went to a park.
　　　  B. I went ice-skating.
　　　  C. I went by bus.
(     ) 3. A. He is tall and strong.
　　　  B. He likes diving.
　　　  C. He would like some apples.
(     ) 4. A. He is 52 kg.
　　　  B. He is 164 cm.
　　　  C. He is 14.
(     ) 5. A. She's happy.
　　　  B. She's Amy.
　　　  C. She's strong.
(     ) 6. A. It comes from the clouds.
　　　  B. It comes from the vapour.
　　　  C. It comes from the water in the river.
(     ) 7. A. I'm a singer.
　　　  B. I'm a girl.
　　　  C. I'm kind.
(     ) 8. A. Because I can swim.
　　　  B. Because I can skate.
　　　  C. Because I can sing.
(     ) 9. A. It's Wednesday.
　　　  B. It's 9th.
　　　  C. It's January.
(     ) 10. A. Yes, there is.
　　　    B. Yes, he is.
　　　    C. Yes, it is.