Classrooms in some schools are equipped with seats that can be _____ to the height of a person.

The doctor　　　the farmer sent his son is well-known in the field.

Have you finished your project, Cathy? —Not yetMy computer

Lao She is one of _____________ of the twentieth century.

Must I finish my homework before class is over?— No, you ______. You can hand it in tomorrow.