I really appreciate ________ to relax with you on this nice island.
A．to have had time B．having time C．to have time D．to having time
------May I borrow these four books?
------_____. You may keep all of them for two weeks.
A．Of course not. B．By all means.
C．Sorry, I am afraid not D．Out of the question.
Please don’t make so much noise.I a novel.
A．writes B．am writing C．wrote D．was writing
假设你是星光中学的李华，将参加主题为“Let’s Ride Bicycles”的英语演讲比赛。请撰写一份演讲稿，主要内容包括：
1.目前汽车带来的空气污染和交通堵塞等问题；
2骑自行车的益处，如节能环保，有利健康等。
参考词汇：低碳生活（low-carbon life） 节能（energy saving）
注意： 1.词数：120词左右；
2.演讲稿开头和结尾已给出，该部分不计入总词数。
Good morning， everyone，
I am Li Hua from Xingguang Middle School. The topic of my speech is “Let’s Ride Bicycle”.
Thank you !
Attention! Our earth has been facing a serious threat—global warming.
According to some _____ (专家), thousands of people die of hot wave1.. ____________
a (每年), and the ice in the poles has been becoming thinner and thinner2. ____ year by year, _____ leads to the rise of the sea level and is threatening3._____ many areas of the world, especially those coastal areas. On the 4.____________ hand, ______ (自然) disasters, like flooding, are more or less connected with5. ____________the global warming, and it’s o that all these are the punishments 6._______from nature. To look back, in the past five _____, that’s half a century, 7.____________we’ve destroyed our environment _____ random to develop the economy8.____________by _____ (滥用) oil and by using private cars instead of public transport.9.___________These r in the rise of greenhouse gases in the atmosphere, causing10.____________the global warming.
Europe’s deadly outbreak of a rare form of E. coli bacteria (大肠杆菌) has brought new attention to food safety issues. One of the problems when people get sick from food is that the simplest question is often difficult or even impossible to answer. Just what did the people eat that made them sick?
Of course, one way to avoid these medical mysteries is to keep dangerous organisms out of the food supply. This is easier said than done, but scientists keep looking for new ways.
Scientists in the United States have developed an experimental system that uses a high-tech optical scanner. The system is designed to identify the presence of contaminants(致污物) like soil or animal waste on fresh produce. These can be sources of E. coli. E. coli bacteria naturally live in the intestines(肠) of humans and many animals. Most kinds of E. coli are harmless but some can make people sick.
The new scanner can also show damage and imperfections that might make the produce unappealing to shoppers.
Scientists designed the system at a Department of Agriculture research center in Beltsville, Maryland. Moon Kim of the Agricultural Research Service led the team.
MOON KIM: “We were requested, we were asked, to develop a method to detect contamination in produce. So we started with the apple as the model sample.”
The scanner uses a high-speed camera placed over the conveyer belt that moves the produce along. As the apples move along the belt, the scanner captures images of each piece of fruit.
Moon Kim says the team hopes the system will be available before long.
MOON KIM: “We are targeting for development in commercial plants for the next several years.”
The scanner can direct a sorting machine to separate the bad apples from the good ones. The system is currently able to show the surface of only half the apple as it speeds by. The inventers hope to improve the process so it can show the whole surface.
1.What is the main topic of the text?
A．Bacteria. B．A high-tech scanner. C．A camera D．Food safety.
2.E. coli bacteria ______.
A．broke out all over the world B．comes from soil or animal waste
C．is extremely harmful to health D．does not cause illness
3.The high-tech scanner ______.
A．can help to sort out different fruits
B．make the produce appeal to shoppers
C．can only capture images of the whole apple
D．can identify the presence of contaminants
4.What can be inferred from the text?
A．The scanner needs to be improved.
B．The scanner will be available in the next several years.
C．Moon Kim is unwilling to develop the scanner.
D．The scanner is connected to a sorting machine.
