单选题 Several exporters decided not to do business in the country ______ the poor exchange rate.
A. because B. unless
C. in spite of D. because of

【正确答案】 D

【答案解析】[解析] 能够引导空格后名词词组the poor exchange rate的介词词组in spite of和because of都可能为正确答案。句子要表示原因，因此D为正确答案。