Answer: A
Analysis:
提高 (tígāo): v. increase; improve; raising.
改变 (gǎibiàn): v. change.
提倡 (tíchàng): v. advocate.
“提高 (tígāo)+ 水平 (shuǐpíng)” is a common fixed grammatical structure in Chinese. A is the correct answer.
A: Nǐ yǒu shénme kuàisù tígāo kǒuyǔ shuǐpíng de hǎo bànfǎ ma?
A：你 有 什么 快速 提高 口语 水平 的 好 办法 吗？
A: Do you have any good ideas on how to improve one’s speaking skills?
B: Zhǐyào nǐ jiānchí měi tiān hé Zhōngguórén liáotiān, nǐ jiù yídìng huì yǒu jìnbù.
B：只要 你 坚持 每 天 和 中国人 聊天， 你 就 一定 会 有 进步。
B: As long as you keep chatting with Chinese people every day, your speaking will surely get better.