单项选择题
每题的四个选项中只有一个答案是正确的，请将正确的选项选择出来。

选词填空
Fill in the blanks with one of the items given.

填空题
Fill in the blanks with an item as required

改写句子
Rewrite the following sentences as required.

问答题
Answer the following question.

简答题
Define the following terms with examples