题目

银杏俗称白果，它属于裸子植物的主要原因是（ ） A．种子外无果皮包被 B．种子外有果皮包被 C．体内有输导组织   D．生殖过程不需要水 答案：A() 3. My father was so tired that he as soon as he lay in bed.   A. put up   B. woke up   C. fell asleep   D. fell down