根据维基百科解释，Multiple choice (MC), objective response or MCQ (for multiple choice question) is a form of an objective assessment in which respondents are asked to select only correct answers from the choices offered as a list. The multiple choice format is most frequently used in educational testing, in market research, and in elections, when a person chooses between multiple candidates, parties, or policies.

单选题 multiple-choice questions

这里“Multiple”是形容词，指“数量多的；多种多样的”；choice意为“选择”，是可供选择的不明对错的项目。此处便有了一个疑问：Multiple-choice不就是多个选择了吗？那应该是多选题呀？

根据《柯林斯高级英语学习词典》第5版，multiple choice的解释是：

In a multiple choice test or question, you have to choose the answer that you think is right from several possible answers that are listed on the question paper.

根据《朗文当代英语词典》第4版，multiple choice的解释是：

A multiple choice examination or question shows several possible answers, and you have to choose the correct one.

这里就存在中英思维差异的问题了。 Multiple（多样的）是来形容选项的数量多，而不是指正确答案是多个。一般来说，Multiple-choice多指单选题，为了避免考生误读，保证作答思路清楚，一般会 添加限定的字眼，比如 “ ONLY ONE CORRECT ANSWER”, “Multiple-choice questions — select One answer choice”。

多选题 multiple-choice questions

multiple-answers questions

多选题的正确解不止一个，需要选出多个正确答案。Answer意为“答案”，multiple-answers questions指多个答案的问题。

在英语国家，选择题一般是单选题。所以不加说明的multiple choice就是指单选。多选的话，会在multiple-choice后加上明确的表达，表明有多个正确选项，例如“There may be MORE THAN ONE correct answer”, “Multiple-choice questions — select MORE THAN ONE answer choices”。