It isn’t quite ___ whether the Tibetan antelope is still being hunted.
A．certainB．sureC．safeD．careful
A

試題分析：考查形容詞：A. certain確定的，B. sure確定的，C. safe安全的，D. careful仔細的，句意：是否藏羚羊正在被捕獵還不確定。AB都有確定的意思，但sure的主語不能是it，certain可以。選A。
點評：特別是漢語意思相近的形容詞，要從它們的搭配和詞義本身的不同區(qū)分，做題時要注意這些差異。
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