A city survey found that the number of people using shared bicycles rose from 12,000 to 21,000 in two years. The writer argues that the city should build safer bicycle lanes before adding more bicycles. Without safe routes, the service may grow quickly but also cause more accidents.
| 時点 | 利用者数 |
|---|---|
| 開始時 | 12,000人 |
| 2年後 | 21,000人 |
数値の変化が、筆者の主張を支える根拠になっているかを確認しましょう。