2.Look The ( )are red.3.They are playing( ) 4.Do an experiment( )him,please!

2.Look The ( )are red.3.They are playing( ) 4.Do an experiment( )him,please!

题目
2.Look The ( )are red.3.They are playing( ) 4.Do an experiment( )him,please!
答案
.Look The (flags )are red.3.They are playing(together ) 4.Do an experiment(on )him,please!
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