问题
单项选择题
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
答案
参考答案：A
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。