单选题 It will be emphasized that commercial space operations are inherently complex, longterm, capital-hungry, and set by a variety of risks.
A. beset by B. inset by C. preset by D. reset by

【正确答案】 A
【答案解析】[解析] beset(后面常与by连用)困扰；inset插页，插入，嵌入(一般不与by连用)；preset预先安置，预先调试，事先调整；reset重新安排。后面三个词大多作及物动词，而本句意为：需要强调的是民用太空计划复杂，耗时长，资金缺且风险重重。因此A为答案。