—Are you satisfied with her answer? —Not at all. It couldn’t have been ________.

It is a fact that _________ differences between countries may cause misunderstandings in communication.

For our middle school students, some courses are compulsory, while others are ________.

The local villager gave such a(n)______description that all the tourists felt as if they were right on the scene.

This year they have produced＿＿＿grain＿＿＿they did last year.