听录音,完成句子。
l. This is a _________.One ________ .    
2.These are _________.Many _________.
3.This is a _________.One ________ .    
4.These are _________.Many __________ .
5. Boys and girls are __________.        
6. Men, women and children are _________ .
l. man、 man     2.men、men     3.woman、woman     4. women、women      5. children      6. people
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