单项选择题

What will happen when there is more solar wind activity

A．Less carbon-14 is produced.
B．More carbon-14 is produced.
C．None carbon-14 is produced.
D．Nothing will happen.
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单项选择题
A．because ofB．instead ofC．withD．without
A．because of
B．instead of
C．with
D．without
单项选择题
What is the expected reaction of the local people to the students’ efforts
A．Sympathetic.
B．Supportive.
C．Don’t care.
D．Don’t welome them.
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