题目

Many activities will be held __________ the visiting guests from America.    A. in memory of    B. in honor of        C. in place of      D. in search of   答案：B炎炎夏日，吃西瓜消暑是一件很惬意的事情，西瓜的果实和种子分别是由什么结构发育而来（ ）A．子房和胚珠B．子房和受精卵C．雌蕊和珠被D．子房壁和受精卵