A-A+
They are sure they have all the facts they nee
问题详情
They are sure they have all the facts they need to ______ the existence of a black hole.
A．obtain
B．maintain
C．verify
D．display
参考答案
正确答案：C
解析：C verify意为“核实，查证”，符合题意，故为答案。而其他三个选项与上下文意思不符，故排除。
