单项选择题

Passage Three
Questions 33 to 35 are based on the passage you have just heard.

What is the drawback of students buying international travel insurance()

A.They can’t immediately get back the money paid for their medical cost.
B.They have to go through very complicated application procedures.
C.They can only visit doctors who speak their native languages.
D.They may not be able to receive timely medical treatment.

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