描述成长变化的比较级运用 — 英语选择题
题目
Jack kept a record of his growth. Last year he could run 100 metres in 18 seconds, but now he does it in 16 seconds. He writes in his diary: "I have become much ______ at running than last year." Choose the correct option to complete his sentence. A. good B. better C. best D. more good