题目内容：

根据句意和汉语注释，写出单词的适当形式。

1.Your spoken English is so poor, please correct your ___________（发音）.

2.His parents have_______________（答应）to buy a new mobile phone for him．

3.The manager is strongly against ___________（回复）to that foreign company at once.

4.Lu Xun is one of the ___________（先锋）of modern Chinese culture.