Five days _______ quite enough.[ ]
A. are
B. were
C. be
D. is
答案：D
为实现祖国统一大业，邓 * * 提出了"（）"的构想.（）年，澳门将回归祖国。
藻类植物的鞭毛类型有尾鞭型和茸鞭型两种类型。
