[     ]

A. He        
B. She          
C. It              
D. He's

A. that
B. whom
C. what
D. which

1. There is a big tree in front of my house, people often rest in the cool s________ of the tree in summer.
2. Yuan Longping is famous for his h________ rice.
3. He g________ from the Southwest Agricultural University in 1953.
4. Yuan Longping has d________ himself to research.
5. Yuan Longping was h________ with the name “Father of Hybrid Rice”.
6. China now p________ enough rice to feed her people every year.
7. In his s________ time, he often writes some stories.
8. It is just a cold. N________ serious.
9. Now Professor Yuan is working on d________ super hybrid rice.
10. She is a s________ swimming in China.