It isn’t quite ___ whether the Tibetan a...

It isn’t quite ___ whether the Tibetan antelope is still being hunted.

A．certain

B．sure

C．safe

D．careful

A 【解析】试题分析：考查形容词：A. certain确定的，B. sure确定的，C. safe安全的，D. careful仔细的，句意：是否藏羚羊正在被捕猎还不确定。AB都有确定的意思，但sure的主语不能是it，certain可以。选A。考点：考查形容词

考点分析：

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