unit 3 amazing people 课时作业(十二)
period 3 reading (2)
预习作业 一、句型转换(每题4分, 共20分)
1. as soon as he entered the room, the telephone rang.
→ ____________ _____________ the the room, the telephone rang.
2. he went ill not long after his journey fron france.
→ he ___________ ill ___________ ___________ his his journey fron france.
3. i think he has something to do with it.
→___________ _____________ think he ____________ ____________ to do with it?
4. the neat year, when he was 17 years old, he began his adventure for the first time.
→the ___________ year, __________ ___________ ___________ ___________ 17, he began his _________ ___________.
5. on saturdays and sundays, the dining hall provides dinner , together with breakfast.
→__________ ____________, the dining hall __________ dinner, __________ __________ _________ brakfast.
课堂作业 二、多项式选择填空 (每题2分, 共40分)
edmund halley was an __(1)____ scientist who lived over 2000 year ago. he ___(2)__ the observations of comets which ___(3)___ scientists had made. the orbit of one particular comet was a very difficult mathematical problem. he could not figure it out. ___(4)____could other scientists who dealt with ___(5)___ problems.
however, halley had a friend named issac newton, who was also a brilliant english mathematician. newton thought he had alreadly worked out that problem, but he could not find the papers ___(6)__ he had done it. he told halley that the ____(7)__ of a comet had the shape of an ellipse(椭圆).
now halley ___(8)___ to work. he ___(9)__ out the orbits of some of the comets that had been ___(10)___ by scientists. he made a surprising ____(11)____. the comets that had appeared in the years 1531,1607 and 1682 all had the ___(12)___ orbit. yet their appearances had been 75 to76 years ___(13)__.
this seemed very __(14)___ to halley. three different comets followed the same orbit. the ___(15)___ halley thought about it, the more he thought that there had not been __(16)___ combets, as people thought. he __(17)____ that they had simply seen the same comet three times.the comet had gone away and had come back again.
it was an astonishing idea! halley felt ___(18))___ enough to make a predition of what would happen in the future. he decided that this comet would appear in the year 1758. there were 53 years to go before halley’s prediction could be tested.
in 1758 the combet __(19)___ in the sky. halley did not see it, for he had died som
