填空题Don't blame him any longer; he ______ (那时一定在专注地读书).
填空题This article mainly discusses about the popularity of Chinese in western countries.
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填空题According to the passage, as a famous scientist. Newton have did ______ theories.
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填空题The average life expectancy in 21 st century will be______.
填空题The higher a substance's pH, the more acidic it is.
填空题It turns out that______(他就是有资格做这一工作的最合适人选)．
填空题When a shared resource is in short supply, organisms compete, and those that ______survive.
填空题Giant Pandas like to live together in all seasons.
填空题With
a history of
more than
four thousand years,the drum is considered
to be
one of the oldest and
widest-used
musical instruments.
A. With
B. more than
C. to be
D. widest-used
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填空题Diet and physical qualities which passed down from our parents affect ______, a natural substance in the liver blood.
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填空题The number of the students in the city has ______(增加了五倍)in comparison with 2001.
填空题What is the purpose of establishing Planned Grandparenthood?____________
填空题If ______ (从长远看来世界上的出生率不能与死亡率持平), then population must either rise or fall.