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.

Scientists have proved what students have long suspected: Maths equations can actually trigger physical pain.

Regions of the brain linked with the experience of physical     1     were activated in those fearful of maths when they were presented with a tough equation, researchers have found. The higher a person’s anxiety of a maths task, the more it     2     activity in regions of their brain associated with visceral (内脏的) threat detection, and often the experience of pain itself.

However, the researchers say their study examines the pain response associated with anticipating an anxiety-provoking event, rather than the pain associated with a     3     event itself. A maths task itself is not painful but     4     the thought of it is highly unpleasant to certain people.

“Maths can be difficult, and for those with high levels of mathematics-anxiety (HMAs), math is associated with tension, apprehension (忧虑) and fear,” the researchers said in their paper titled. When Math Hurts. “    5    , this relation was not seen during math performance,     6     that it is not that math itself hurts, rather, the anticipation of math is painful. These results may also provide a potential neural mechanism to explain why (people with) HMAs tend to     7     math and math-related situations, which in turn can bias (使有偏见) (those with) high levels of mathematics-anxiety away from taking math classes or even entire math-related     8     paths. We provide the first neural     9     indicating the nature of the subjective experience of math-anxiety.

Other forms of psychological stress, such as social     10     or a traumatic break-up, can also elicit feeling of physical pain.”