问题描述：
i have just ___(receive)a letter.It's from Susan.
The teacher came into the classroom while the students___(talk)loudly.
Tom has a pet dog___(name)Connie.
_____(drop)litter is never allowed all overthe world.
the fast food restaurant has___(run)out of this kind of food.
The teacher came into the classroom while the students___(talk)loudly.
Tom has a pet dog___(name)Connie.
_____(drop)litter is never allowed all overthe world.
the fast food restaurant has___(run)out of this kind of food.
问题解答：
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