题目内容：

根据句意和汉语提示写出单词，完成句子。

1.I found it difficult for me to learn the English ___________(语法) well.

2.His book received high ____________(赞扬) from lots of readers.

3.Our work are need to reach a new ______________(标准).

4.She has made two ___________(演讲) about how to learn English well recently.

5.Su Ning is ready to take on _____________( 挑战).