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The economic forces which may affect the new public offering of stock include sudden downturns in the market, hedging and other investor strategies for preventing losses, ______the interest rates in Washington, and ______undercapitalized.

单项选择题When we (think of) creative people the names that probably (spring to mind) are (those of) men such as Albert Einstein, Pablo Picasso, great artists, inventors and scientists—(a selective) and exceptionally gifted body of men with rare talent and genius.