IV. Choose the word (A, B, C or D) that best fits each blank space in the following passage.
Claustrophobia is an anxiety disorder (17) _______ causes an intense fear of enclosed spaces. If you get very nervous or upset when you're in a tight place, like a/an (18) _______ or a crowded room, you might have claustrophobia. Some people have claustrophobia symptoms when they're in all types of closed-up areas. Others notice the problem only when they're in certain cramped spaces, like inside an MRI machine. No matter where claustrophobia pops up for you, you can overcome it (19) _______ the right treatment. You may also feel a sense of doom, like you're going to die or the world is going to end. These feelings can be very (20) _______, even if you're not really in danger. And though you might realize that the fear isn't rational, you may not be able to stop it. Panic attacks are intense and (21) _______ last 5-30 minutes. Along with shortness of breath and sweating, you may also have chest pain and tightness. These are also the symptoms of a heart attack. If you're not sure whether your problems come from anxiety (22) _______ a heart problem, get medical help.
