GWD-18-39

plmnpler

Q39:

The survival of a rare New Zealand species of mistletoe that produces spectacular sprays of scarlet flowers is threatened both because their leaves are extremely tasty to a voracious opossum species and also because their flowers are pollinated by two species of birds whose populations are in decline.

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1. is threatened both because their leaves are extremely tasty to a voracious opossum species and also because their
2. is threatened both because its leaves are extremely tasty to a voracious opossum species and because its
3. is threatened both because its leaves are extremely tasty to a voracious opossum species and also its
4. are threatened both because its leaves are extremely tasty to a voracious opossum species and its
5. are threatened both because their leaves are extremely tasty to a voracious opossum species and because their

答案是B，我选了A。

想请教species of mistleteo对应的代词应该是单数还是复数？

babybluejia2

明白了谢谢

 

shiningstar

both because.... and because... 这样才平行，其他的楼上的都讲了

 

oliviading

both, and,好 both,  and also中的also多余了

CrystalHW

为什么不能选C呢?

我看不出來有沒有加上because会有很大差別..

plmnpler

o ,原来是这样,谢谢 ~~~

dreamerp

A中两个their指代了单数的mistletoe错误了

aurora2008

原文已经说明了 a (rare New Zealand) species, 单数

susanyakis

A不对,both...and...要接等同的并列成分,A中also多了,其次 its指 mistletoe