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A. how to do that  
B. how do that  
C. how do you do that

A. him to come
B. he will come
C. he to come
D. he comes

A. how to        
B. where to      
C. what to        
D. when to

A. What do you think          
B. Do you think what    
C. When do you think          
D. Do you think when

1. I'm not sure what I can buy for my brother. ( 改為同義句)
    I'm not sure_____ _____  _____ for my brother.
2. The young man is so a strong that he can carry the heavy box.  (改為同義句)
    The young man is strong _____  _____ carry the heavy box.
3. I really don't know what I should write to him.  (改為同義句)
    I really don't know_____  _____ _____ to him.
4. What's wrong with it? (改為同義句)
    _____  _____ _____ with it?
5. We should help him to write letters. (改為否定句)
    We _____ _____ him to write letters.

A. why          
B. how          
C. what          
D. when

A. what it is      
B. what is it        
C. it is what      
D. is it what

A. its her sharpener  
B. her sharpener
C. their sharpeners      
D. it's her sharpener

A. where can I buy shampoo
B. where am I buy shampoo
C. where did I buy shampoo
D. where I can buy shampoo

A. isn't      
B. wasn't    
C. not        
D. not in