A-A+
Although the hazards of space travel are many
问题详情
Although the hazards of space travel are many, tile rewards made it a worthwhile ______.
A．endeavor
B．execution
C．expenditure
D．expedition请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：逻辑关系题：解释。[A]endeavor“努力，尽力”是对spacetravel的描述，spacetravel是一种努力。[B]execution“执行，执行”；[C]expenditure“花费，支出”；[D]expedition“远征，远征队”；这三项都不能使语义通顺。
