they ( )( )the big box for me,but they opened the small one.按要求完成句子

问题描述:

they ( )( )the big box for me,but they opened the small one.按要求完成句子

they (were )(put )the big box for me,but they opened the small one.

have left(或kept)
他们给我留了那个大盒子,但打开了那个小的。

originally (firstly) prepared

they (should )(open )the big box for me,but they opened the small one。老师讲的