2. 职称英语
  3. ______1987, membership in the World Agricultural Foundation has fallen by 20 per

______1987, membership in the World Agricultural Foundation has fallen by 20 per

游客2025-06-13  16
问题 ______1987, membership in the World Agricultural Foundation has fallen by 20 percent.
选项 A、Into
B、For
C、Since
D、During
答案 C
解析 解决问题的线索是句子的时态。空格后面出现了1987年，所以其后可以接时间的(B)、(C)、(D)都有可能是正确答案，而表示“自……以来”的介词却只有(C)since一个。since后面不接时间点而接句子时，句子要用过去时态，如I have knownher since she was a child。
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