[单项选择]When were pulse rates taken
A. After every exercise period.
B. Every time the ratio of active riding was increased.
C. Every day.
D. After each step-test.

[单项选择]When were the images of Mars taken

[单项选择]When were the trademark registration provisions modified


A. 1880.
B. 1870.
C. 1905.
D. 1915

[单项选择]The best color pictures are taken when _________.
A. the sun is directly overhead
B. the range of highlights and shadows is large
C. the sun is lower in the sky
D. black and white film is used

[单项选择]When were the shuttle and telescope moved into a higher orbit


A. Before the telescope was repaired.
B. After the rocket was exploded.
C. When the rocket was within less than a kilometer from the spacecraft.
D. When the experts could look deeper into space than ever befor

[单项选择]Even when they were allowed to work, they were never given responsible jobs.
A. 即使她们允许别人工作，她们也会负起责任。
B. 即使她们被允许工作，她们也不会负起责任。
C. 即使她们被允许工作，她们也决不会得到合适的工作。
D. 即使她们允许别人工作，她们也不会给别人合适的工作。

[单项选择]Jane was badly taken in when she paid $300 for that second-hand bicycle; it was not worth
A. that all much
B. all that much
C. much all that
D. that much all

[单项选择]The planes disappeared when they were flying near the United States.

[单项选择]We were talking on the phone when we were ______.
A. cut down
B. cut off
C. hung up
D. hung back

[单项选择]When plastics were invented a hundred and twenty years ago, _____________.
A. people found they were cold materials
B. their shapes were set permanent
C. people accepted them at once
D. they did not enjoy immediate popularity

[单项选择]What were the official interest rates before the Reserve Bank of Australia announced a cut


A. Around 7.0 percent.
B. Around 7.5 percent.
C. Around 6.5 percent,
D. Around 0. 5 percent.

[单项选择]Some concrete actions were taken to improve the living conditions there but proved to be __________.
A. at a premium
B. to no avail
C. of their own accord
D. on the alert

[单项选择]

Black people were first taken to North America as slaves in the seventeenth century. Sold by Arab or Mrican slave-traders in West Mrica, they were on the tobacco, sugar and cotton plantations.
Towards the end of the eighteenth century, more and more people began to condemn (谴责) slavery, but it was not until after the bitter Civil war-between the Northern and Southern states of America that is was abolished there. In 1865 the 13th Amendment to the Constitution gave blacks the right to live and work where they liked. Then ,in 1867, came further legislation (立法)guaranteeing citizenship and other civil rights.
However, there were setbacks almost immediately. The Supreme Court declared the civil rights legislation of 1867 unconstitutional and a number of new segregation (种族隔离)laws were enacted. Consequently ,as more and more blacks deserted the rural areas in search of work in the cities, they found themselves forced to .live in areas with the worst housing and
A. At the end of 18th Century.
B. In the 17th century.
C. After the Civil war.
D. In 1867.