大全21－13，22。

深海的小美人鱼

13.    On the Great Plains, nineteenth-century settlers used mud and grass to build their homes, doing it without timber and nails.
(A) settlers used mud and grass to build their homes, doing it without
(B) settlers used mud and grass to build their homes, did it without
(C) settlers used mud and grass to build their homes, making them while not having
(D) settlers used mud and grass to build their homes, making do without
(E) settlers’ homes were built of mud and grass, making do without

making do without在这里我觉得很别扭。这种用法我从来没见过。有人能讲解下吗？

深海的小美人鱼

22.    Unlike most warbler species, the male and female blue-winged warbler are very difficult to tell apart.
(A) Unlike most warbler species, the male and female blue-winged warbler are very difficult to tell apart.
(B) Unlike most warbler species, the gender of the blue-winged warbler is very difficult to distinguish.
(C) Unlike those in most warbler species, the male and female blue-winged warblers are very difficult to distinguish.
(D) It is very difficult, unlike in most warbler species, to tell the male and female blue-winged warbler apart.
(E) Blue-winged warblers are unlike most species of warbler in that it is very difficult to tell the male and female apart.

A为什么不对呢？

iselibra

make doing 凑合着用（我昨天问的，呵呵）
warble species和male and female warble还是有区别的

深海的小美人鱼 ，怎么咱们错的题目这么像阿
呵呵

深海的小美人鱼

呵呵，那就互相帮助吧。

gemj

同意iselibra。
22中应该是物种对物种，或者鸟对鸟。
物种对鸟不合适。
虽然鸟也属于一个物种。