题目

Let's have a picnic if it _______ this Sunday. But nobody knows if it _______. A . is fine; will rain B . was fine; would rain C . will be fine; rains D . rains; rains 答案：A蟋蟀的发育过程要经过卵、若虫、成虫三个时期，这个发育过程称为（ ）A．不完全变态 B．完全变态 C．变态发育 D．不变态发育