请教OG10 152

niswzzhn

152. When the technique known as gene-splicing was invented in the early 1970's, it was feared that scien­tists might inadvertently create an "Andromeda strain," a microbe never before seen on Earth that might escape from the laboratory and it would kill vast numbers of humans who would have no natural defenses against it.

(A)              it would kill vast numbers of humans who would have no natural defenses against it

(B)              it might kill vast numbers of humans with no natural defenses against it

(C)             kill vast numbers of humans who would have no natural defenses against it

(D)             kill vast numbers of humans who have no natu­ral defenses against them

(E)              kill vast numbers of humans with no natural
                    defenses against them

 

In addition, choices B, D, and E lack would and thus do not express the conditional.是什么意思啊？谢谢大家。

niswzzhn

顶啊。