2. The letter was from my parents.　　 I received the letter yesterday.

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1. This is the tree.　 The boy fell off from it.

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6. I like the singing groups ______ are modern and popular.

5. All ______ can be done must be done.

4. They talked of the things and persons ______ they remembered in the factory.

3. He is one of the workers ______ has been saved in that accident.

2. That book is the one ______ I bought yesterday.

1. The man ______ is talking with my mother is my father.

10. Those _____ will go to the park stay here.

A. who　　　　　 B. that　　　　　　　　　 C. whom　　　　　　　 C. whose

9. Those pictures _____ were drawn by Tom are nice.

A. who　　　　　 B. whose　　　　　　　 C. whom　　　　　　　 C. which