[求助]

gullit52

請教大全8,18,25



8.A huge flying reptile that died out with the dinosaurs some 65
million years ago, the quetzalcoatlus had a windspan of 36 feet, believed to be the largest flying creature the world has ever seen.



A) believed to be

b) and that is believed to be

c) and it is believed to have been

d) which was, it is believed,

e) which is believed to be



the answer is c,why C not E



18. A peculiar feature of the embryonic mammalian circulatory system is
that in the area of the heart the cells  adhere to one another, beating in

      unison and adopting specialized orientations exclusive of one another.



A) beating in unison and adopting

B)  they beat in unison while adopting

C) beat in unison, and adopt

D) beating in unison yet adopting

E) even though they beat in unison and adopt



Why the answer is D not C



25. A recent study of ancient clay deposits has provided new evidence supporfting the theory of global forest fires ignited by a meteorite impact that

      contributed to the extinction of the dinosaurs and many other creatures some 65 million years ago.



A) supporting the theory of global forest fires ignited by a meteorite impact that

B) supporting the theory that  global forest fires ignitrd by a meteorite impact

C) that supports the theory of global forest fires that were ignited by a meteorite impact and that

D) in support of the theory that global forest fires were ignited by a meteorite impact and that

E) of support for the theory of a meteorite impact that ignited global forest fires and



Why the answer is B



Thanks

jandjshi

Would you please split the questions into separate threads, and put the question number in the subject? It can help other to search for related information of a particular question in the future. thanks.  

gullit52

sorry I forget to type the subject completely, I will remeber to do that next, thanks

8.A huge flying reptile that died out with the dinosaurs some 65 million years ago, the quetzalcoatlus had a windspan of 36 feet, believed to be the largest flying creature the world has ever seen.

A) believed to be
b) and that is believed to be
c) and it is believed to have been
d) which was, it is believed,
e) which is believed to be

the answer is c,why C not E

18. A peculiar feature of the embryonic mammalian circulatory system is
    that in the area of the heart the cells  adhere to one another, beating in
    unison and adopting specialized orientations exclusive of one another.

A) beating in unison and adopting
B)  they beat in unison while adopting
C) beat in unison, and adopt
D) beating in unison yet adopting
E) even though they beat in unison and adopt

Why the answer is D not C

25. A recent study of ancient clay deposits has provided new evidence supportting the theory of global forest fires ignited by a meteorite impact that contributed to the extinction of the dinosaurs and many other creatures some 65 million years ago.

A) supporting the theory of global forest fires ignited by a meteorite impact that
B) supporting the theory that  global forest fires ignitrd by a meteorite impact
C) that supports the theory of global forest fires that were ignited by a meteorite impact and that
D) in support of the theory that global forest fires were ignited by a meteorite impact and that
E) of support for the theory of a meteorite impact that ignited global forest fires and

Why the answer is B

Thanks