答案:C
解析:
Choice (C) is correct. It avoids the lack of parallelism of the original by replacing the present participle "alternating" with the past tense verb "alternated," which is logically consistent with the past tense verb "incorporated."
您现在的位置: 首页 > SAT > SAT每日一题 > 正文
答案:C
解析:
Choice (C) is correct. It avoids the lack of parallelism of the original by replacing the present participle "alternating" with the past tense verb "alternated," which is logically consistent with the past tense verb "incorporated."