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初等英语水平考试四级模拟试题(四)
I. Choose the best answer选择最佳答案，并按题号顺序将答案转涂到答题卡上。
( ) 1. Jack kept quiet about the accident ______ lose his job.
A. so not as toB. so as not toC. so as to notD. not so as to
( ) 2. The sentence needs ______.
A. an improvement C. improvingB. improve D. improved
