People have always been（）about exactly how life on earth began.

单项选择题There used to be a museum in the east of the city, ______

单项选择题Most people agree that the present role of women has already affected U,S. society. ______, it has affected the traditional role of men.

单项选择题When I came back, I found my bicycle was ______.

单项选择题Hainan Island is ______ largest island of China.

单项选择题Tim will call me as soon as he ______ my package.