送交者: silxirt 于 2016-03-01, 15:34:54:

回答: A city is problems of organized complexity, correct grammatically? and why? 由 hopelessless 于 2016-03-01, 14:26:27:

• 和楼下一样，is都是对的，我想hoplelessless问的是为什么。 (无内容) - five (0 bytes) 2016-03-01, 18:13:24 (802260)
  • I thought incorrect grammatically, is... s, or ..s is..., but they are correct (无内容) - hopelessless (0 bytes) 2016-03-02, 00:29:01 (802283)
  • A billion dollars is a large sum of money. (无内容) - five (0 bytes) 2016-03-01, 18:17:02 (802261)

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