1 . It is likely that we may ________ great benefits from such releases of genetically engineered organisms into the environment — providing they do what we expect them to.

A．invalidate

B．derive

C．prohibit

D．reserve

2 . 虽然专家们对修建该野生动物保护区的做法深信不疑，但对当地居民而言这并不能有效为该区域的动物抵御外侵物种，经济上也不具有回报性。（as, nor）(汉译英）