It's rather___________that I still can't solve the problem.

问题描述:

It's rather___________that I still can't solve the problem.
A embarrassBembarrassing C boring D interesting哪一个解释说明

答案选B
It 指代that I still can't solve the problem.,主语是物
is 后面的词作表语,需要形容词
B 令人尴尬的
C无聊的
D有趣的
根据句意,选B