[单项选择]The first heart transplant was so controversial because people believed that ______.

[单项选择]The first heart transplant was so controversial because people believed that ______.

[单项选择]During the first period of demographic history, societies were often in danger of extinction because_________.


A. only one in ten persons could live past 40
B. there was higher mortality than fertility in most places
C. it was too dangerous to have babies due to the poor conditions
D. our ancestors had little enthusiasm for more children

[单项选择]The first summit between the United States, the Soviet Union and Britain during World War II was held in ______ in November 1943.
A. Yalta
B. Cairo
C. Tehran
D. Potsdam

[单项选择]His heart was ______ so violently that he could hardly catch his breath.


A. bouncing
B. beating
C. jumping
D. punching

[单项选择]（）in my life impressed me so deeply as my first visit to the Palace Museum.
A. Anything
B. Nothing
C. Everything
D. Something

[单项选择]Procter & Gamble hopes to transplant foreign idea back to its home territory because


A. Americans are more likely to buy foreign made products than before
B. more foreigners are hired in its top management than before
C. foreign made products are superior to homemade ones in terms of quality
D. for most Americans foreign products are much more attractive than homemade ones

[单项选择]Who should make a decision in the organ transplant if a donor's organ were equally suitable for two recipients


A. The doctors.
B. The donors.
C. The recipients.
D. Not mentioned in the passag

[单项选择]Despite transplant surgeons' work, every year many people die because______.


A. they are unlucky patients
B. organ transplantation is unreliable
C. there are not enough proper organs for transplantation
D. few people are willing to donate their organs after death

[单项选择]According to the passage, a transplant of tissue between genetically incompatible organisms will result in the transplanted tissue ______.
A. becoming a parasite
B. being treated as an invader
C. altering its genetic makeup
D. developing a new immune system

[单项选择]She（）have missed the first bus, or she（）be here so early.
A. needn't, shouldn't
B. couldn't can't
C. shouldn't, mayn't
D. mustn't, wouldn't

[单项选择]The controversial disputes between North Korea and US would ______.


A. continue as an undecided issue
B. be delayed for future discussion
C. be discussed next month
D. be more tense than before

[单项选择]She ______ fifty or so when I first met her at a conference.
A. had been
B. must be
C. has been
D. must have been

[单项选择]Who will NOT be discussing the controversial issues


A. More than 50 heads of states.
B. Government representatives.
C. Representatives of business.
D. Representatives of citizens.

[单项选择]

A controversial decision on whether choice cuts of steak and cartons of milk produced from cloned animals are suitable for the dinner table is now long overdue.
Hundreds of pigs, cows and other animals created with the help of cloning are living (1) farms across the United States and (2) the forthcoming ruling will directly (3) American consumers, British holidaymakers may also (4) themselves at the forefront of a food revolution that many commentators expect will (5) arrive here.
(6) the birth of Dolly the sheep-the first mammal cloned from an adult cell--there were extreme predictions of herds of genetically (7) bulls and pastures (8) with cloned dairy cows.
That double (9) of the past decade has not yet been realized (10) clones have become a familiar sight at agricultural fairs in America, where producers of (11) pigs and cattle have been among the first to (12) cloning
A. wisdom
B. foresight
C. illusion
D. vision