16. (25289-!-item-!-188;#058&002314)
The single-family house constructed by the Yana, a Native American people who lived in what is now northern California, was conical in shape, its framework of poles overlaid with slabs of bark, either cedar or pine, and banked with dirt to a height of three to four feet.
(A) banked with dirt to a height of
(B) banked with dirt as high as that of
(C) banked them with dirt to a height of
(D) was banked with dirt as high as
(E) was banked with dirt as high as that of
17. (25335-!-item-!-188;#058&002335)
The success of the program to eradicate smallpox has stimulated experts to pursue what they had not previously considered possible--better control, if not eradication, of the other infections such as measles and yaws.
(A) what they had not previously considered possible--better control, if not eradication, of the other infections such as
(B) what they had not previously considered a possibility--better control, if not eradication, of such infections like
(C) something they had not previously considered possible-better control, if not eradication, of such infections as
(D) something not considered a previous possibility--better control and perhaps eradication, of other infections such as
(E) the possibility of what they had not previously considered--better control and possibly eradication of infections like
18. (25381-!-item-!-188;#058&002338)
Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1967 by graduate student Jocelyn Bell, it had not been announced until February, 1968.
(A) Although the first pulsar, or rapidly spinning collapsed star, to be sighted was in the summer of 1967 by graduate student Jocelyn Bell, it had not been announced until February, 1968.
(B) Although not announced until February, 1968, in the summer of 1967 graduate student Jocelyn Bell observed the first pulsar, or rapidly spinning collapsed star, to be sighted.
(C) Although observed by graduate student Jocelyn Bell in the summer of 1967, the discovery of the first sighted pulsar, or rapidly spinning collapsed star, had not been announced before February, 1968.
(D) The first pulsar, or rapidly spinning collapsed star, to be sighted was observed in the summer of 1967 by graduate student Jocelyn Bell, but the discovery was not announced until February, 1968.
(E) The first sighted pulsar, or rapidly spinning collapsed star, was not announced until February, 1968, while it was observed in the summer of 1967 by graduate student Jocelyn Bell.
连续错三道题，特别晕，大家做做看
默哀一下
有没有NN帮忙解释一下
16
its framework of poles overlaid with slabs of bark, either cedar or pine, and banked with dirt to a height of three to four feet
独立主格结构，and后的成分与独立主格的被动谓语overlaid并列，且也用被动，所以是banked；c中的banked them就成了主动，不对；b中的that无指代对象
17
举例不能用like，排除be；d中的a previous possibility很awkward；a中的the other infections是一个限定结构，我们知道有one， the other的用法，那总体必须出现，否则限定不明，使得指代不清
18
discovery 被announce，star 被 sight，考的是表达的逻辑意思的正确性
豁然开朗，非常感谢
仰慕之情滔滔不绝
先顶再看！
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