【题目】Our duty in the school is _________ trying and learn by heart.

【题目】You had better _________ the teacher for help when you have questions.

【题目】By the end of last month, we _________ twelve English story books.

【题目】Don't be angry _________ him. He has already tried his best.

【题目】Germany is a big country and it is _________ economy in Europe.

【题目】You can't finish reading the newspaper in a minute because there is too much _________ in it.

【题目】When helping others, actually, at the same time, we are helping _________.

【题目】It is not good manners to find _________ excuse when you are late for school.

【题目】Which of the following underlined parts is different in pronunciation from others?

【题目】