For questions 16-30, complete the following article by writing the missing words in the correct box on the answer sheet. Use only one word for each space. The exercise begins with an example (0).
Put simply, an allergy is a disorder in which the body over-reacts to harmless substances which in normal circumstances should not produce any reaction at all. An allergy can occur in almost (0) ….. part of your body, and can (16) ….. caused by just about anything. Mainly (17) , allergies become evident on parts of the body directly exposed (18) ….. the outside world. Certain allergies occur only at certain times of the year, while (19) ….. are there all the time. Those (20) occur all the year round are probably caused by something you come into contact (21) every day of your life, some seemingly harmless object (22) ….. as your deodorant (23) ….. the pillow you lie on each night. Allergies can occur at any time during your life, (24) ….. usually do so before your fortieth birthday. Sometimes the symptoms are (25) ….. slight you do not even know you have an allergy, and it may take years (26) ….. an allergy to become noticeable. It all depends (27) ….. the amount of the substance to (28) ….. you are exposed and for how (29) ….. . Sometimes an allergy can disappear as (30) ….. as it arrived, without any treatment. Sometimes it comes and goes for no apparent reason, and with no regularity.