完成下列算式。
1. three + nine = ____________
2. ____________ + ten = sixteen
3. twenty － ____________ = eighteen
4. four + thirteen = ____________
5. eight + ____________ = nineteen
6. ten + seven = ____________
How heavy are you? ___________
[     ]
A. Fine, thank you.
B. I'm 14 years old.
C. I'm 50kg.
— What is thirty and twelve?
— It's _____________.
[     ]

A. fourty-one
B. forty-two
C. forty-one
D. forty two

Dinosaurs were huge animals. They lived ___________ years ago.
[     ]
A. hundreds of
B. thousands of
C. millions of
用英文数字填空。
fifteen     eleven     fourteen      ten      twelve
1. 5+9=                 
2. 100  －               =90     
3. 22  －                 =10     
4. 7+8=                  
5. 16  －                 =5
The length of a killer whale is               meters.
[     ]
A. 15    
B. 8    
C. 25
单项选择。
How many students are there in your class?
[     ]
A. Yes, it is.                                
B. Forty-five.
10+3=  _____. 
[     ]
A. thirteen    
B. fourteen   
C. fifteen     
D. twelve 
              lines make a square.
[     ]
A. Three             
B. Four           
C. Two
It's about three _____________ kilometres.
[     ]
A. hundreds
B. hundred
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