单项选择题 From (such data) Wegener developed his floating continents theory. He envisioned an original super continent that crystallized (of) molten material (making up) the infant earth; eventually the mass (cracked) and broke into several pieces - the present continents.（）

单项选择题 Distinguished architecture requires the expenditure of large sums of money, even if it is by no means certain （） the expenditure of large sums of money （） distinguished architecture.

单项选择题 （） a larger percentage of its gross national product on defending its coasts from rising seas than （）.