14. Paleontologists believe that fragments of a primate jawbone unearthed in Burma and estimated at 40 to 44 million years old provide evidence of a crucial step along the evolutionary path that led to human beings.
A. at 40 to 44 million years old provide evidence of
B. as being 40 to 44 million years old provides evidence of
C. that it is 40 to 44 million years old provides evidence of what was
D. to be 40 to 44 million years old provide evidence of
E. as 40 to 44 million years old provides evidence of what was
1. 主謂一致(單復(fù)數(shù)) （一級排除B,C,E ）
fragments 。。。。。。。。provide
2. 簡潔：(一級排除 C. E )
what was … 多余
Sth is sth.
Sth does sth.
Sth is what is sth. (錯(cuò), 1. 不并列, 2. 用單個(gè)名詞和what 從句的概念對稱肯定不對)
例句
There is speculation that increasing cold weather was what may have been responsible for the Anasazi move from Mesa Verde to sites in other canyons.
(A) that increasing cold weather was what may have been
(B) whether increasing cold weather was what was
(C) that increasingly cold weather was what had been
(D) whether increasingly cold weather may have been what was（E）
(E) that increasingly cold weather may have been
speculation that,,,,,名詞Be what…..be 前后的東東要是一個(gè)東東啊…
3.. Estimate to be / that/ at ？(詞的用法 二級排除A）estimated to be ……… estimate 做被動，只能是 sth. be estimated to be.......Estimate that….. estimate 做主動，用estimate sth. that B 中的estimated that it is it 多余
It is estimated that……
At+地點(diǎn), at+點(diǎn)時(shí)間(點(diǎn)和線) 不能加年份的
金山詞霸解釋
Estimate vt. -mated, -mating估計(jì)，判斷（常與that連用）估價(jià)，（常與at連用）估計(jì)
I estimate her age at 35.我估計(jì)她有35歲。
（與in連用）估計(jì)…到達(dá)
A. at 40 to 44 million years old provide evidence of
B. as being 40 to 44 million years old provides evidence of
C. that it is 40 to 44 million years old provides evidence of what was
D. to be 40 to 44 million years old provide evidence of
E. as 40 to 44 million years old provides evidence of what was
1. 主謂一致(單復(fù)數(shù)) （一級排除B,C,E ）
fragments 。。。。。。。。provide
2. 簡潔：(一級排除 C. E )
what was … 多余
Sth is sth.
Sth does sth.
Sth is what is sth. (錯(cuò), 1. 不并列, 2. 用單個(gè)名詞和what 從句的概念對稱肯定不對)
例句
There is speculation that increasing cold weather was what may have been responsible for the Anasazi move from Mesa Verde to sites in other canyons.
(A) that increasing cold weather was what may have been
(B) whether increasing cold weather was what was
(C) that increasingly cold weather was what had been
(D) whether increasingly cold weather may have been what was（E）
(E) that increasingly cold weather may have been
speculation that,,,,,名詞Be what…..be 前后的東東要是一個(gè)東東啊…
3.. Estimate to be / that/ at ？(詞的用法 二級排除A）estimated to be ……… estimate 做被動，只能是 sth. be estimated to be.......Estimate that….. estimate 做主動，用estimate sth. that B 中的estimated that it is it 多余
It is estimated that……
At+地點(diǎn), at+點(diǎn)時(shí)間(點(diǎn)和線) 不能加年份的
金山詞霸解釋
Estimate vt. -mated, -mating估計(jì)，判斷（常與that連用）估價(jià)，（常與at連用）估計(jì)
I estimate her age at 35.我估計(jì)她有35歲。
（與in連用）估計(jì)…到達(dá)