[单项选择]Being defeated for the third time, it seemed to him that it was no use_______ anything any more.
A. to try doing
B. trying to do
C. to try to do
D. tried to do

[单项选择]After our computer network （） for the third time that day, we all went home．
A. crashed
B. collided
C. smashed
D. fell

[单项选择]It is the third time that I （　）here.
A. was
B. am
C. have been
D. had been

[单项选择]Not until I reminded him for he third time （）watching TV and went to bed.
A. that he stopped
B. does he stop
C. did he stop
D. that he stops

[单项选择]It was the third time the villagers _________ interviewed by the radio station.
A. have been
B. had been
C. were
D. are

[单项选择]The human species came into being at the time of the greatest biological diversity in the history of the Earth. Today, as human populations expand and alter the natural environment, they are reducing biological diversity to its lowest level. The ultimate consequences of this biological reduction are beyond calculation, but they are certain to be harmful. That, in essence, is the biodiversity crisis.
The history of global diversity can be summarized as follows: after the initial flowering of multi-cellular animals, there was a swift rise in the number of species in early Paleozoic times (between 600 and 430 million years ago), then plate-alike stagnation for the remaining 200 million years of the Paleozoic era, and finally a slow but steady climb through the Mesozoic and Cenozoic eras to diversity’s all-time high. This history suggests that biological diversity was hard won and a long time in coming. Furthermore, this pattern of increase was set back by five massive extinction epis
A. The reduction in biodiversity represents a setback both for science and for society as a whole.
B. The material and cultural wealth Of a nation are insignificant when compared with the country’s biological wealth.
C. The human species is in the process of initiating an unprecedented massive extinction episode.
D. The current decline in species diversity has potentially grave consequences for the human species.

[简答题]

At a time when Wall Street firms are being punished for misleading investors about dot-com stocks during the bubble, it’ s all too easy to confuse financial excitement with technological reality. Many people are quick to dismiss any talk of an "Internet revolution" as so such’ 90s chatter. (47) There is a world of difference between crazy evaluations and serious technology, between Internet stocks and the Net itself. While investors have been complaining about their fate, chief executives have been busy embracing the Net. It’ s time to get over the bubble talk and get real about technology’ s promise.
Or risk falling behind. The strong upturn in profits last quarter during a period of weak economic growth is proof to the productivity—enhancing power of the Net. Through boom, bust and recovery, annual productivity growth has powered along at around 2.5%. Without it, companies would have been forced to cut payrolls even

[单项选择]For the time being, it is not a bad choice.
A. nearly
B. presently
C. lastly
D. temporarily

[单项选择]Just use this room for the time being, and we' ll offer you a larger one（　）it becomes available.
A. as soon as
B. unless
C. as far as
D. until

[单项选择]We live in a time when，more than ever before in history，people are moving about.（　）
A. 我们在那里住了一段时间，当时，比历史上以往任何时期都多的人们都在四处走动。
B. 我们在那里住了一段时间，当时，人们正在比历史上任何时期都多地四处走动。
C. 我们生活在一个时代里，在这个时代里，人们正在比历史上任何时期都多地四处走动。
D. 我们生活在一个人们四处奔波甚于历史上任何时期的时代。

[单项选择]By the time you get to Greenwich you （）the most historic parts of London.
A. will be seeing
B. will see
C. are going to see
D. will have seen

[填空题]

W: Hi, Peter, what do you do in your free time What hobbies do you have
M: Well, I have a lot of hobbies. I like to read, and I like to work on computers. Probably my two favorites are going to the gym and bird-watching. They’re both two hobbies that balance each other well because one is inside and one is outside, so it doesn’t matter what the weather is like, I can always do one.
W: And what do you enjoy most for each activity
M: Well, when I go to the gym, I usually go in the morning. So when I do, it makes the rest of the day feel much better. I feel healthy and good, and I also have a lot of friends at the gym, so I enjoy being with them. Bird-watching is the most relaxing thing I do during my week. I enjoy classifying birds, and I keep lists and compile lists of where I’ve seen the birds and what birds I’ve seen.
W: How long do you spend on each activity
M: When I go to the gym, I try to go for an hour and a ha