People have (1) flying saucers for over a (2) years now and scientists have reported other things in space too. Many scientists have tried to (3) flying saucers but most have (4) . They have been called many names because no one is (5) what they are. 3（）
举一反三
- In science fiction we read of flying saucers travel through space, so people want to have a better knowledge of the universe.（)
- In science fiction we read of flying saucers travel through _____ space, so people want to have ______ better knowledge of the universe. A: the ; a B: ; C: the ; D: ; a
- According to the first paragraph, many leading scientists ______. A: have attempted to explain physical life from a religious point of view B: have acknowledged that only religion Can explain the mystery of life C: have been puzzled by the mystery of life and material things D: have tried to solve the mystery of life
- Many pure metals have little use because they are too soft, rust too easily, or have some other _______.
- Most of us have too many things to do in our life.