题目

 — Look at the boys on the playground.  — Oh, they        basketball. They        a basketball match next Sunday.              A. are playing; are going to have     B. play; have                   C. play; has                                   D. are playing; had 答案：A有些蛾初羽化时只靠味觉来找食物，因此不能找到无味的花但当它采过无味的花后，最后建立了视觉和事物之间的联系，以后就能采无味的花了，这种行为称为A.学习行为B.取食行为C.贮食行为D.繁殖行为