Translation of "Assignment" in Chinese

When will you finish your assignment?

你什么时候做完工作？

I was abroad on an assignment.

我在国外指派了。

The assignment took me longer than I had expected.

我用了比我预期更长的时间来完成作业。

It's necessary that we all work together to complete this assignment.

我们必须七手八脚完成这个任务。

Now that I have finished this assignment I want to go to sleep, but I have to go to school.

我做完功課，想去睡覺，可是又要上學⋯⋯