古代有一位科学家说：“如果给我一个支点，我可以把地球撬起来”，这位发明杠杆原理的科学家是（　　）

已知A、B、C三点不在同一条直线上，则以这三点为顶点的平行四边形共有（　　）

⑴What colour is her dress ?____              A、It's Mike's .

⑵What time is it now ?____                      B、It's white and black .

⑶Whose is this ?____                                C、They are apples .

⑷What are they ?____                              D、No , she isn't .

⑸Is your mother at home ?____               E、It's five o'clock .