Are you still busy ?—Yes, I _______ my work and it won’t take long .

Most students like dinosaurs, but ______ of them know the story of dinosaurs.

___is well known is that Africa had contacts with India and the Red Sea civilizations from the earliest times．

Mum, where did you put my sweater?—Is it _____ black one? I put it in _____orange box near your desk.

The clothes are _______ for twenty yuan.[ ]