未知题型

By Oct 2010, a large number of Vélib’s initial bikes had to be replaced due to vandalism or theft, according to Times.

【参考答案】

By October 2010, a large number of Vélib's initial bikes had......

(↓↓↓ 点击下方‘点击查看答案’看完整答案、解析 ↓↓↓)