单项选择题

What does the speaker say about people who encounter stress once in a while（）

A．Their performance may improve.
B．Their immune system may be reinforced
C．Their blood pressure may rise all of a sudden.
D．Their physical development may be enhanced.

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单项选择题
What is the problem that troubles many people nowadays according to the speaker（）

A．They often feel insecure about their jobs.
B．They are unable to decide what to do first.
C．They are incompetent to fulfill their responsibilities.
D．They feel burdened with numerous tasks every day.
单项选择题
What is the man’s chief responsibility in the Green Peace organization（）

A．Organising protests.
B．Recruiting members.
C．Acting as its spokesman.
D．Saving endangered animals.
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