单项选择题

He left his mountain village and worked in the town. The least he could do is ______ his parents once in a while.

A．write to
B．wrote to
C．to write to
D．be writing to
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单项选择题
Geologists use special equipment to ______ the existence of valuable minerals beneath the earth' s surface.
A．inspect
B．detect
C．indicate
D．evaluate
单项选择题
Is it ______ you are born that decides your nationality
A．there
B．where
C．anywhere
D．the country
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