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What were people concerned about according to the surveys?

• A、Their inability to gather enough dat

• B、The decrease in butterfly populations.

• C、Their anxiety in doing the surveys.

• D、The duration of the counting task.

Nick: Hi, Ryan. Do you know when the test results will come out?

Ryan:  56（ ）  

Nick: I'm anxious to see how I did.  57（ ）  

Ryan:I'm not that nervous.  58（ ）  

Nick: I think most of the test was pretty easy, but some of the questions were tricky.

Ryan: 59（ ） That won't do you any good.

Nick:How could you stay so calm all the time?

Ryan: 60（ ）  

Nick: You're lucky. I worry all the time.

Why should trees be bulldozed in firefighting?

• A、To put out a controlled fir

• B、To help the victims escap

• C、To prevent fires from spreadin

• D、To make way for firefighters.