单项选择题

21（）

A．is developing
B．has developed
C．develops
D．is being developed

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相关考题

单项选择题

Which of the following statements best expresses the main idea of the passage（）

A．Many people who went West were doctors.
B．Medicine and the people who sold it were not reliable.
C．Many pioneer women died from bites inflicted by snakes and mosquitoes.
D．Pioneer women had to invent their own remedies when they moved West.

填空题

A．limit
B．minute
C．willing
D．life

单项选择题

Many countries still execute people who ______ serious crimes, especially murder.

A．commit
B．do
C．carry
D．violate