New words：

confuse [kən'fju:z] v.混淆；使迷惑；使糊涂；使更难于理解
confused [kən'fju:zd] adj.糊涂的；迷惑的；不清楚的；混乱的
Austria [ˈɔːstrɪə] n.奥地利

Sample Sentences：

The road signs confused the driver.
He's always confusing salt with sugar.
Give me a break.I'm very confused now.
Please don't confuse Australia with Austria.
They asked so many questions that they confused me.
They asked me so many questions that I got confused.

New words：

cure /kjʊr/
n.治疗；对策；药；疗法
v.治愈；解决；矫正；治好（疾病）

Sample Sentences：

There is still no cure for a cold.
The only way to cure backache is to rest.
When I left the hospital I was completely cured.
He has blind faith in doctors' ability to find a cure.

New words：

riddle ['ridl] n.谜；谜语；谜题

Sample Sentences：

He could not solve the riddle.
He found out the riddle at last.
He got the answer to the riddle as quick as a flash.
Stop talking in riddles (= saying things that are confusing) ─say what you mean.

New words：

debt [det] n.债务；欠款；借款；恩情

Sample Sentences：

He has a lot of old debts to meet.
If I pay all my debts I'll have no money left.
The debt that he owed her could never be paid.
We'll run into debt if you spend more than our income.

New words：

issue ['iʃju:] n. 问题；重要议题；争论的问题

Sample Sentences：

There was no issue at all between us.
If you have any issues, please call this number.
This is a big issue ; we need more time to think about it.
They have published a lot of new books on international issues.