单项选择题

The expression "bracing themselves for the worst" in the second paragraph probably means ______.

A．sneering at the impending difficulties
B．cheering themselves up for the worst situation.
C．preparing themselves for the worst situation.
D．having a total disregard for the coming difficulties.

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单项选择题

All of the following statements are true of climate scientists EXCEPT ______.

A．they are all clued up about climate.
B．they don't know much about climate.
C．they are probing into the field of climate.
D．they are uncertain of climatic phenomena.

单项选择题

It can be inferred from the first paragraph that ______.

A．climate scientists are contemptuous of weather forecast.
B．it is a venture to forecast what weather is like tomorrow.
C．Schar has the audacity to do what others seldom did.
D．Schar has made gloomy predictions on future weather.