1 . Directions: Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.

A. fatigue       B. qualified          C. challenge       D. routine       E. persistent F. meant        G. necessarily       H. fueled            I. suffer          J. recognize       K ideally

For the entirety of our life we have been coping with anxiety. But having some anxiety, especially in a stressful situation, isn’t     1     bad and can actually be beneficial, experts say. The right amount of anxiety can improve performance.

Anxiety is an uncomfortable emotion, often     2     by uncertainty. It can create intense, excessive and     3     worry and fear, not just about stressful events but also about everyday situations. There are usually physical symptoms too, like fast heart rate, muscle tension, rapid breathing, sweating and     4    .

Too much anxiety can be debilitating (使体弱力衰). But a normal amount is     5     to help keep us safe, experts say. “The emotion of anxiety and the underlying physiological stress response evolved to protect us,” Wendy Suzuki, a neuroscientist and the author of “Good Anxiety,” said, “Managing stress may be more useful than getting rid of it.” According to the Yerkes-Dodson Law, a theory that originated in the early 20th century from experiments on mice, increasing amounts of cognitive arousal, or stress, can improve performance — but only up to a certain point. The theory, represented by a curve shaped like a mountain, shows that after it peaks, greater levels of stress cause performance to     6    .

When anxiety is turned up too high, Dr. Suzuki added, it tends to become less useful. The first step in controlling anxiety that holds you back is to     7     when you’re feeling overly anxious and try to dial it down.

A certain degree of anxiety can help people prepare for a potential     8    , remain cautious and stay organized. But if anxiety is making you “uncomfortable more often than not” or interfering with     9     functioning and preventing you from living the life you want to live, that signals the need for additional support,     10     from a mental health professional.