＿blood when you can and many lives will be saved.A.To give B.Give C.Given D.Giving
问题描述：
＿blood when you can and many lives will be saved.A.To give B.Give C.Given D.Giving
答
give
算是祈使句吧,动词give 加名词 blood
Give blood when you can and many lives will be saved.
when you can 是从句,当你可以（献血时）
and连接的是两个并列成分,所以and之前的句子成分要完整,所以这个地方只能选give.
当你能够献血的时候去献血,可以拯救很多生命.