Sand is formed by the weathering and decompostition of all types of rock, _______most abundant mineral constituent being quartz.
A and its
B since its
C its
D it is (C)
举报
________ in the daytime for most of the year, the groundhog hibernates
in a burrow during winter.
A Is active
B That it is active
C Active
D While is active (C)
The outstanding feature of copper and the other metals of Group IB in the Peridic
Table is chmical attack.
A resists
B to resisting
C their resistance to
D by resistance (C)
1. 可以看出逗号后面的句子没有谓语而前面又是个完整的句子,所以只能选its,后面的那一句做前面rock的同位语,起补充说明作用。
2 逗号之前的全部做状语
3题目不完整,划线在哪里
D it is
我认为答案应该是C,该题的结构是:完整的句子,补充成分。a中and表明前后要并列,所以后面应该是有谓语的。b,since后面要加完整的句子。d错在两个句子间用了,而没有用连接词。
D While is active
a错在两个句子用逗号隔开。b中的that用在这里不知道是做什么成分,所以错。c正确adj结构,完整的句子。这种结构100%正确。D,while引导的从句中没有主语,while 的用法中确实有省略的形式,但是那必须是要主系一起省略的,而且这种省略还要以一些条件作基础,故D错
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