问题
单项选择题
When joining a vessel，do not forget personal documents and your spectacles，and（）if necessary.
A.drug
B.remedy
C.medicine
D.healer
答案
参考答案：C
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When joining a vessel，do not forget personal documents and your spectacles，and（）if necessary.
A.drug
B.remedy
C.medicine
D.healer
参考答案：C