Rare objects are beautifully displayed in glass cases____the

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Rare objects are beautifully displayed in glass cases____them free from dust.
A.which are keeping,
B.which keep .
C.who keep
D. and kept.
这句话中为什么选B,不选D,为什么只能用定语从句,不能用并列句,区别是什么,它们在一个句子里,谢谢

既然你已经明白了B答案是对的,我就不解释定语从句了.那为什么用and的并列句不对呢?
原因是：既然是并列句,也就是说并列句前半部分主语应该和后半部分一致,好,我们来还原一下句子,把你认为对的D答案代进去：
Rare objects are beautifully displayed in glass cases （and kept）them free from dust.
那么刚才说了主语保持一致,再把主语代进去,
Rare objects are beautifully displayed in glass cases （and rare objects kept）them free from dust.
那么,这样看来,D答案就不对了,因为“保持他们远离尘埃”这个动作是玻璃箱glass cases发出来的.
希望您满意!O(∩_∩)O哈哈~

rere objects are beautifully displayed in glass case to keep 被动语态谓语动词问题necklaces and rings beautifully (are) (displayed) 英语翻译Ensuring that components or documents are displayed in P animals rare too china these in are 英语翻译which scientist discovered that objects in water are lif which scientist discovered that objects in water are lifted It's not rare in ______that people in______fifties are gonin are these rare animals in china?(改为肯定句） Some tea___(is /are )in the glass. You are that rare There are seven objects (visible to the naked eye) in the sk 英语翻译Objects in the night sky are resources that provide ever