语法是不是这个狗?还有allow that 是承认 allow to do是允许 正确答案是to do嘛? (204) GWD-18-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.
A. is threatened both because their leaves are extremely tasty to a voracious opossum species and also because their B. is threatened both because its leaves are extremely tasty to a voracious opossum species and because its C. is threatened both because its leaves are extremely tasty to a voracious opossum species and also its D. are threatened both because its leaves are extremely tasty to a voracious opossum species and its E. are threatened both because their leaves are extremely tasty to a voracious opossum species and because their