Hay fever is a seasonal allergy to pollens. The term “hay fever,” however, is a less than adequate description
since such an attack can be brought on by sources other than hay-producing grasses and since an attack of this
allergy does not include a fever. The cause of hay fever can be quite varied. Hay fever is generally caused by
airborne pollens, particularly ragweed pollen. The amount of pollen in the air is largely dependent on geographical
location, weather, and season. In the eastern section of the United States, for example, there are generally three
periods when pollen from various sources can cause intense hay fever suffering: in the springtime months of
March and April, when pollen from trees is prevalent; in the summer months of June and July, when grass pollen
fills the air; and at the end of August, when ragweed pollen is at its most concentrated levels. What results from an
attack of hay fever is not a fever. Instead, a person with hay fever will suffer symptoms such as red and itching
eyes, a swollen and runny nose, and repeated bouts of sneezing.
【題組】66. Ragweed pollen is prevalent at the beginning of ____ in the eastern United States.
(A) Spring (B) Summer (C) Fall (D) Winter
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