some animals are dangerous.that's( )they( )stay in cages A b

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some animals are dangerous.that's( )they( )stay in cages A because,have to B why,must C becau,must
D why,have to(解析

D
动物很危险,必须(不得不)关笼里.A C肯定错.B D的话因为动物不是自己要关笼里的,是被人强迫的,所以选HAVE TO
再问：为什么要用why而不是because？
再答：动物很危险,这就是"为什么"它们要关笼里. 用BECAUSE的话变成了动物很危险,这就是因为他们要关笼子里.. 显然不对的.并不是关了笼子里后才危险的..

some animals are dangerous.that's( )they( )stay in cages A b The zoo kept some animals in the cages so that they would no some animals are in __ .let's protect them.(dangerous) Tigers are ____ animals.They should be in the cages. 英语选择,两空That's ( ① ) they have to stay in cages.But I don't t 初一英语短文填空There are many animals.The tigers are in cages.They what are those ( )young animals.A,those is B,that's C,they a most animals are kept in cages that are too small for them.句 The dangerous animals look ( )when they are in the zoo.A gen Some animals are dangerous,but some are ( ). we are ______keeping animals in tiny cages where they can ha The animals are tired.But now they have to s____ in cages or