In this part, there is a passage with five blanks. For each blank there are four choices marked A,B,C and
D: Choose the best answer for each blank and mark your answer on the Answer Sheet. If you have a health condition like heart disease, you’ll want to know what to do 1 a medical emergency on an airplane. Any medical emergency is scary. But if it happens when you’re flying, it can be terrifying. Research published in the New England Journal of Medicine(　　)found that in-flight medical emergencies 2 1 out of every 604 flights. There are a lot of things you need to consider if a medical emergency occurs 39,000 feet in the air: What medical equipment is 3 ? How quickly can you land and get to a hospital? Is there a medical professional on board who can help you? The truth is, flying with a serious health condition, such as cardiovascular(　　) disease，which could lead to a heart attack or stroke(　　)，can be riskier than you think， says Philip Rubin，MD，an assistant professor of 4 at Yale School of Medicine(　　)in New Haven, Connecticut. Dr. Rubin knows firsthand just how precarious in-flight medical emergencies can be. In 2014,while he was flying from Phoenix to Detroit on a commercial airline, a fellow passenger experienced cardiac(　　)；the passenger’s heart stopped, and he 5 consciousness.