单项选择题

In the early 20th century, at the advent of the telephone, it was considered a superfluous instrument which would never be of practical use in the average household.（）

A．appearance
B．popularity
C．dominance
D．consolidation

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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.（）

A．such data
B．of
C．making up
D．cracked

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.（）

A．think of
B．spring to mind
C．those of
D．a selective

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