57.It is always a good idea to buy ________. If you get sick or lose one of your possessions while traveling, the insurance company will pay your medical expenses or give you money.
(A) medicines
(B) travel guide
(C) duty free goods
(D) travel insurance
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統計: A(11), B(3), C(3), D(113), E(0) #664972
統計: A(11), B(3), C(3), D(113), E(0) #664972