There are _________floors in the building. Tom lives on the_________ floor.
[     ]
A. twenty; twelfth
B. twenty; twenty
C. twentieth; twelve
D. twentieth; twelfth
_____ visitors come to China every year.
[     ]
A. Thousands of
B. Ten thousands
C. Ten thousand of
D. Thousand of
It's horrible to see        _ people in such a small park.          
[     ]
A. five thousands
B. thousands of  
C. thousand of  
D. five thousands of
We had planted _____ trees by the end of last spring.   
[     ]
A. two hundred of                  
B. two hundreds
C. hundred of                        
D. hundreds of        
The stone horse is about _____.
[     ]
A. 200-kilo-heavy      
B. 200-kilos-heavy
C. 200 kilos heavy      
D. 200 kilo heavy
______people around the world watch the Olympic Games.
[     ]
A.Million of
B.Millions of.
C.The million
D.Tmillions.
Our summer holiday is coming. Two ______ the students in our school will go to the beach.       
[     ]
A. hundred    
B. hundreds    
C. hundred of    
D. hundreds of
—What class are you in?
—I am in ______.
[     ]

A. class Four
B. Class Four
C. four class
D. Four class

Excuse me. I have _____questions to ask.
[     ]
A. two more  
B. more two    
C. another  
D. the others
It is reported that people throw _______ plastic bags along this street everyday.    
[     ]
A. hundred      
B. hundreds    
C. hundred of      
D. hundreds of
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