摘要： The work is easy for an expert, it is difficult for an inexperienced person. A. unless B. though C. when D. while
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_The work is easy for an expert _______it is difficult for an inexperienced person.
A.because B.therefore
C.while D.unless
查看习题详情和答案>>The work is easy for an expert _______it is difficult for an inexperienced person.
- A.because
- B.therefore
- C.while
- D.unless