[填空题] Tennis
During the first 50 years of its history,
tennis was largely a pastime of (1) ______ 1. ______.
people. Its widespread popularity began with
the growth of (2)______. This happened 2. ______.
immediately after the major national
championships became (3) ______ events. 3. ______.
They began to accept professionals as well as
amateurs. Soon industrial firms began to
(4)______ tournaments and offer large cash 4. ______.
prizes. The turning point came in 1968, when
the British, with the final permission of the
International Lawn Tennis Federation,
transformed their Wimbledon championships to
an open event. In the same year, they went a
step further by erasing the (5)______ 5. ______.
between amateurs and professionals. Women
players’ demand for (6) ______ prize money 6. ______.
gained its first success in the United

[填空题] Tennis
During the first 50 years of its history,
tennis was largely a pastime of (1) ______ 1. ______.
people. Its widespread popularity began with
the growth of (2)______. This happened 2. ______.
immediately after the major national
championships became (3) ______ events. 3. ______.
They began to accept professionals as well as
amateurs. Soon industrial firms began to
(4)______ tournaments and offer large cash 4. ______.
prizes. The turning point came in 1968, when
the British, with the final permission of the
International Lawn Tennis Federation,
transformed their Wimbledon championships to
an open event. In the same year, they went a
step further by erasing the (5)______ 5. ______.
between amateurs and professionals. Women
players’ demand for (6) ______ prize money 6. ______.
gained its first success in the United

[简答题]During the first twenty years of service, the average time from New York to Liverpool was 23 days and the average trip back to New York took 40 days. (Passage Three)

[单项选择]During its formative years, the inner solar system was a rough-and-tumble place. There were a couple of hundred large objects flying around. Moon-size or bigger, and for millions of years they collided with one another. Out of these impacts grew the terrestrial planets—Mercury, Venus, Earth with its Moon, and Mars—and the asteroids.
Scientists have thought of these collisions as mergers: a smaller object (the impactor) hits a larger one (the target) and sticks to it. But new computer modeling by Erik Asphaug and Craig B. Agnor of the University of California, Santa Cruz, shows that things weren’t that simple. "Most of the time, the impactor and the target go off on their merry ways," Dr. Asphaug said. About half the collisions are these hit-and-nm affairs. Now the two researchers and a colleague, Quentin Williams. have done simulations to study the effects of these collisions on the impactors. They are not pretty.
"The impactors suffer all kinds of fates," Dr. Asphaug said. T
A. it was always static
B. it always acted as the target
C. there is no collision happening to it
D. its cover is very hard