Afterworkingfortwentyhourswithoutanyrest,thedoctorswere_______.

It is not ---_______ for me to return all the books to the library now because I still need some of them for my research.

Wewon’tallowanyforeigncountryto_______inourinternalaffairs.

Thismorningintheclass,ourteacherlosthis______atlastbecausehecouldnotstandanymore.

Whenmakingmoderncameras,peoplebeganto_______plasticsformetal.