We are twin sisters. Being a twin is a lot of fun!

Most of the time, people look at us _________ surprise when we are walking down the street. People can't tell one of us from _________. Some people like to guess which of us is older or younger, but they rarely give the right _________. Even our parents sometimes called us by the wrong names when we were young! Usually we'd tell them they were wrong, _________ sometimes we just said: "You got it! Congratulations!“

You may have heard of “brood telepathy”(心灵感应)_________ twins. There are many movies about it. I can tell you that it’s real. We both love reading novels and eating snacks. We love to go travelling all over the world. And, it's hard to believe, but we got the very same scores on _________ the mid-term exams and the final exams in one semester!

People always say we look just like one person. But in fact, there are many _________ between us. One difference is that one of us has a mole(痣) on her face, and the other one _________. And our personalities(个性)are different, too. One of us doesn’t like to talk much and the other is _________

As we ______________ most of our time playing with each other, neither of us has too many other good friends. But we don’t need to worry about that, because we each have the best sister in the world.

1.A.in B.on C.at D.for

2.A.other B.others C.the other D.another

3.A.answer B.problem C.question D.advice

4.A.and B.but C.or D.so

5.A.among B.between C.through D.under

6.A.both B.either C.neither D.every

7.A.communities B.conversations C.difficulties D.differences

8.A.didn’t B.isn't C.doesn't D.haven't

9.A.quiet B.serious C.boring D.outgoing

10.A.take B.cost C.spend D.pay

Twentieth Century Inventions

1903-The first flight succeeded In 1900, Wilbur Wright said flight was possible for man. After much work, he and his brother Orville Wright made this dream come true.On December 17, 1903, the brothers made the first successful airplane flight on a windy beach at Kitty Hawk, North Carolina. The brothers' plane flew 120 feet. Although the flight lasted only 12 seconds, it moved the course of history in a new direction.

1935-Nylon was invented In 1928, a new chemical lab was opened to make a kind of man-made materials. Wallace Carothers took part in the team when he was 32 years old. In 1934, he made fibers(纤维), but the fibers were quite weak. He didn't give up. After many experiments, he produced the fibers "nylon". Carothers was very satisfied with his work. Nylon hit the markets in 1939, and quickly became a replacement of silk. But it was a pity that he didn't see the wide use of his invention. He died in April, 1937.

1968-The computer mouse was first shown in public.As a graduate student, Douglas Engelbart began to imagine ways in which all sorts of information could be on screens. In 1964, Douglas Engelbart made the first computer mouse. The computer mouse had a wooden shell with two metal wheels. In 1968, the first computer mouse appeared in public. It was named"mouse "because a tail came out at the end. In later years. the computer mouse became more and more important. Douglas Engelbart changed the way that computers worked. Now computer mice are becoming increasingly useful. And there are many different shapes of computer mice in the world.

1.When did the first flight succeed?

_____________________________________________________

2.What was opened to make a kind of man-made materials in 1928?

_____________________________________________________

3.When did Wallace Carothers die?

_____________________________________________________

4.What was first shown in public in 1968?

_____________________________________________________

5.Who changed the way that computers worked?

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