【题目】You ought to return the book to the school library _____. Other students will borrow it.

【题目】If you want to be a green person, you ought_____energy and _____air pollution.

【题目】His actions made me______angry____say a word.

【题目】Please say in a loud voice______all the class can hear.

【题目】Mom always encourages me________more housework in my free time.

【题目】Students ought _____ the truth.

【题目】—It’s a long story, but you can hardly find new words in it.

【题目】I thought the actor was famous, _________ none of my friends has ever heard of him.

【题目】--- Is our Wechat account safe?

【题目】--- David, ________. You fall asleep in class again!