[填空题]It was the first time Rebecca (invite)（）us to dine out.

[填空题]It was the first time Rebecca (invite)（）us to dine out.

[填空题]It was the first time Rebecca (invite) （）us to dine out.

[填空题]It was the first time Rebecca (invite) （） us to dine out.

[填空题]It was the first time Rebecca (invite) ______ us to dine out.

[填空题]That was not the first time he had betrayed us. I think it’s high time______(我们对他采取有力措施).

[填空题]It was the first time they (invite) ______ us to dinner.

[单项选择]The first time I tried shark-fin soup was at Time Warner’s annual dinner in Hong Kong. Shark-fin soup is a luxury item ($100 bowl in some restaurants)in Hong Kong and Mainland China, its biggest consumers; it’s a dish that embodies east Asia’s intertwined notions of hospitality and keeping (or losing) "face". "It’s like champagne", says Alvin Leung, owner of Bo Innovation, a Cantonese restaurant in Hong Kong. "You don’t open a bottle of Coke to celebrate. It’s a ritual. "
Unfortunately, this gesture of hospitality comes with a price tag much bigger than that $ 100 bowl. All told, up to 70 million sharks are killed annually for the trade, despite the fact that 30% of shark species are threatened with extinction. "Sharks have made it through multiple mass extinctions on our planet, " says Matt Rand, director of Pew’s Global Shark Conservation division. "Now many species are going to go the way of th
A. It has a price tag much bigger than $ 100 bowl.
B. It carries rich cultural meaning.
C. It tastes like champagne.
D. It is expensive for its high nutrition.

[单项选择]When did they meet the first time
A. One evening.
B. One morning.
C. In the evening.

[单项选择]What does the first announcement tell us about newly arrived passengers
A) They need to wait for another bus. C) They can get on to the bus now.
B) They will transfer from one bus to another. D) They have to wait for some time.


A. What does the first announcement tell us about newly arrived passengers
B. They need to wait for another bus.
C. They can get on to the bus now.
D. They will transfer from one bus to another. D) They have to wait for some time.

[填空题]Flying across the Atlantic for the first time was a great (achieve)（）

[填空题]For the first time, scientists have profiled specific genetic changes during the aging of experimental animals, a discovery that could aid work to extend life span and preserve health. The study, conducted with mice at the University of Wisconsin, combines a powerful new genetic technique with dietary restriction, the only known way to delay the aging process.
66. ______
Moreover, it reveals how a low-calorie diet, the only known method of slowing aging in several animal species, works at the most basic level to extend life span and preserve health. Such knowledge, used in concert with new technologies capable of rapidly surveying the activity of thousands of genes at once, premises to accelerate the development of drugs that mimic the age-retarding effects of a low-calorie diet, according to the Wisconsin scientists.
The Wisconsin team, led by Tomas A Prolla, a UW-Madison professor of genetics, and Richard Weindruch, a UW-Madison professor of medicine, profiled th