Question

【题目】 — I know Jack has already collected （成千上万的邮票）.
—Yes, he's crazy about it.

Answer 1

【答案】thousands of stamps
【解析】句意：—我知道杰克已经收集了成千上万的邮票。—是的，他对这件事很痴迷。thousands of + 可数名词的复数，故用thousands of stamps。