Only recently______to realize the dangers caffeine(咖啡因)might bring to our health.
A．that scientists began
B．have scientists begun
C．scientists have begun
D．that did scientists begin

未分类题【T5】A.ACCESS B.WHETHER C.ON A.GIVING REPORTERS【T1】______TO MORE INFORMATION AND THEIR READERS A CHANCE B.IT PROVIDES PEOPLE FAST ACCESS TO NEWS AND A CHANCE TO COMMENT【T2】______IT C.【T3】______IT'S RIGHT OR WRONG 'BUT THE GREATEST POTENTIAL FOR PUBLIC PARTICIPATION IS STILL IN THE FUTURE,' STEVEN CASE, CHAIRMAN OF AMERICA ONLINE, TOLD A RECENT MEETING ON JOURNALISM AND THE INTERNET SPONSORED BY THE FREEDOM FORUM (论坛).HOWEVER, SOME OTHER EXPERTS OFTEN SAY THE NEWTECHNOLOGY OF COMPUTERS IS CHANGING THE FACE OF JOURNALISM,【T4】_______TO ASK QUESTIONSAND TURN TO DIFFERENT SOURCES. 'YOU DON'T HAVE TO BUY A NEWSPAPER AND BE CONFINED TO THE FOUR CORNERS OF THAT PAPER ANY MORE,' SAM MEDDIS, ONLINE TECHNOLOGY EDITOR AT USA TODAY, OBSERVED ABOUT THE VARIETY OF INFORMATION AVAILABLE TO COMPUTER USERS. BUT THE EXPERTS NOTED THE EASY ACCESS TO THE INTERNET ALSO MEANS ANYONE CAN POST INFORMATION FOR OTHERS TO SEE.'ANYONE CAN SAY ANYTHING THEY WANT,【T5】_______,' SAIDCASE.READERS HAVE TO DETERMINE FOR THEMSELVES WHO TO TRUST.'IN A WORLD OF ALMOST INFINITE VOICES, RESPECTED JOURNALISTS AND RESPECTED BRAND NAMES WILL PROBABLY BECOME MORE IMPORTANT, NOT LESS,' CASE SAID. 'THE INTERNET TODAY IS ABOUT WHERE RADIO WAS 80 YEARS AGO, OR TELEVISION 50 YEARS AGO OR CABLE 25 YEARS AGO,' HE SAID.BUT IT IS GROWING RAPIDLY BECAUSE【T6】______.

未分类题What is the most important way for people to use more fresh water according to the author?A．To take more water from the sea.B．To protect mountainous areas.C．To save more water in daily life.D．To protect the natural ecology balance.

单项选择题Speaker A: I have two tickets for the concert tonight. Would you like to come? Speaker B: ______A．I'd love to, but I promised my mother I'd take my sister to a show.B．Really? When did you buy the tickets?C．Why do you ask me to go with you?D．I can't because actually I'm not very keen on concerts.

单项选择题Speaker A: Do you mind if I open the window? Speaker B: ______A．Yes, please open the window.B．Yes, I do find it is very stuffy in the room.C．No, I don't. Don't open the window please.D．As a matter of fact, I'm feeling a bit chilly.

单项选择题Speaker A: Im worried about those classes I missed when I was sick. Speaker B:______A．I am glad that you have got well.B．Don't worry. Everything will be all right.C．I'll try to bring you up to date on what we've done.D．Maybe you should explain to our teacher why you were absent from class last week.