34. This is a difficult problem all of us can't work it out.A. such; thatB. so;thatC. suc

发布时间：2020-08-16 06:12:58


34. This is     a difficult problem      all of us can't work it out.
A. such; that
B. so;that
C. such; as
D. so;as

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(答案→)A. such; that
B. so;that
C. such; as
D. so;as
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