单项选择题

Why can’t people on earth be harmed by radiation

A．We are too far away from any harm.
B．We can protect ourselves.
C．There is part of the atmosphere protecting us.
D．There is special layers on our skin.
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单项选择题
What is the meaning of success in the general sense of the term
A．Making a lot of money as soon as possible.
B．Finding someone and geting married and having children.
C．An interrupted life of reading and thinking.
D．Experiencing and to realizing to the maximum the forces that are within us.
单项选择题
According to the author, if plants are grown in a water-tight container, they will______.
A．definitely die
B．grow thinner
C．be OK
D．be injuried on their roots
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