题目

一株绿色开花植物形成果实和种子，一般必须完成的两个重要生理活动是：（   ） A．开花和传粉                                            B．开花和受精 C．传粉和受精                                               D．自花传粉和异花传粉 答案：C--I went to see you at 3 o'clock yesterday afternoon．but you weren't at home． --Oh．I _________a film with my parents in a cinema． A．saw           B．was seeing            C．have seen            D．am seeing