上海世博会吉祥物的蓝色表现了（）等元素，符合主办城市的特点，更传递了上海世博会的主题。

A．海洋、人文、发展

B．海洋、科技、发展

C．海洋、未来、科技

—I believe we will have a good time with Miss Green in your birthday party.

—Maybe. But it is still a question, you know, ______ she can spare time to come.

A．whether

B．/

C．that

D．which