You must complete three written assignments.

你必须完成三个书面作业。

《牛津词典》

You will need to complete three written assignments per semester.

你每学期要完成三个书面作业。

《牛津词典》

The assessment for the course involves written assignments and practical tests.

这门课程的评估包括各种书面作业和实践测试。

《柯林斯英汉双解大词典》

He had written a large handful of college exercises and assignments in Latin, and he had obviously made a favorable impression on his teachers, one of whom, at least, he stayed in touch with for years.

他用拉丁文写过大量练习,和作业，很显然，他也给老师留下了良好的印象，他还跟其中的一位老师保持了很多年的联系。

耶鲁公开课 - 弥尔顿课程节选

In our programme every class involved a blend of team and individual assignments, so good communication skills, both written and verbal, were essential to be successful on virtual teams.

ECONOMIST: Home, not quite alone

Our assignments are either programming assignments, which are to be submitted online or are to be written on a paper(very informally) and handed over.

FORBES: What Is It Like To Study Computer Science At IIT?