OG 152

leehom

When the techniue known as gene-splicing was inventd 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.C. kill vast numbers of humans who would have no natural defenses against it.
对于正确选项C，OG解释：B.D and E lack would and thus do not express the conditional.请问为什么要是conditional?

[此贴子已经被作者于2003-11-21 19:09:10编辑过]