单项选择题

What can we learn from the passage

A．Fear and worry are dangerous.
B．Fear and worry can sometimes help us.
C．Fear and worry will cause damage unless kept under control.
D．No one can control fear and worry.

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单项选择题

When Rod Laver got behind, he would ______.

A．play a "safe" game
B．become nervous
C．forget what the score was
D．play a relaxed game

单项选择题

Kelly's main problem was that ______.

A．he didn't have a wheelbarrow
B．Casey wouldn't lend him his wheelbarrow
C．he was controlled by his worries until he believed them
D．he hated Casey