fill with 与 fill up with 有什么区别The river would soon ( )with mud if not dealt with properly.A fill up B fillB为何不得?是不是用B要改成被动?

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fill with 与 fill up with 有什么区别The river would soon ( )with mud if not dealt with properly.A fill up B fillB为何不得?是不是用B要改成被动?

fill with 与 fill up with 有什么区别The river would soon ( )with mud if not dealt with properly.A fill up B fillB为何不得?是不是用B要改成被动?
fill with 与 fill up with 有什么区别
The river would soon ( )with mud if not dealt with properly.
A fill up
B fill
B为何不得?是不是用B要改成被动?

fill with 与 fill up with 有什么区别The river would soon ( )with mud if not dealt with properly.A fill up B fillB为何不得?是不是用B要改成被动?
你说的对.
fill up的意思是 使充满,及物动词短语.
而fill是填充,是不及物动词.

up有“满”这个意思
题目中说的是河流充满什么,不是有填充了什么,因为他说如果不及时处理,那么就是河流会充满泥巴

充满的意思喽