19 ．下列关于时间优先原则的说法中，正确的是 （) 。A ．同一时点申报，按价格大小顺序决定优先顺序B

What is it that the author wants to ______ to his readers through the story？

A．convey

B．convince

C．convert

D．conform

What is it that the author wants to ______ to his readers through the story？

A．convey

B．convince

C．convert

D．conform

What is it that the author wants to ______ to his readers through the story？

A．convey

B．convince

C．convert

D．conform

The author' s purpose in writing this article is to ______.

A．inform. readers of Heller' s findings in his researches

B．persuade readers to get enough sleep at different ages

C．show readers the importance of getting enough sleep

D．tell readers how many hours of sleep they should get

In his example the author tells his readers that ______. ()

A．it is important to build up one's physical capacity

B．it is no good having much physical training

C．it is more important to know one's capacity than to win tile race

D．it is important to have physical training while one trains his mind

In his example the author tells his readers that ______.

A．it is important to build up one's physical capacity

B．it is no good having much physical training

C．it is more important to know one's capacity than to win the race

D．it is important to have physical training while one trains his mind

What conclusion can we draw from the passage？

A．The author tries to tell the readers how important the language is.

B．The author intends to explain the significance of culture in global communication.

C．The author thinks his mistake is only an awkwardness in his everyday life.

D．The author wants to illustrate what the sentence "Don"t use thanks" means.

The author tries to persuade readers to accept his argument mainly by ______.

A．pointing out the faults in what zoos do

B．using evidence he has collected at zoos

C．questioning the way animals are protected

D．discussing the advantages of natural habitats