D, the best choice, uses a correct sequence of present and future indicative verb forms--predicts, will fail, and is--in the three related clauses. Density, an abstract "mass" noun, is logically construed with greater than. In A and B, would fail disagrees with the other verbs in tense and mood. Choice A misconstrues density with more numerous than, and B uses the pretentious and illogical word provided for if m a conditional clause after a negative idea (would fail)(provided不能用于否定). C's should fail and was are confusing and inconsistent with predicts. C and E use the absurd phrase timber wolf density. (The wolves are not dense; their population is dense.) E also uses an inconsistent subjunctive form, were, and misconstrues density with more numerous than. Provided: conj. On the condition; if: 在…的条件下;如果:(只能用于表达肯定思想的句子中) will pay the bonus provided the job is completed on time. 如果工作及时完成的话将发奖金
|