Fill in the blank(s) in each sentence with a phrase from the box in its appropriate form. stake a claim, plow into be proportional to tread on attribute ... to, carve out sidle up breathe down sb’ s neck 4 . S o f a r A n t a r c t i c a c a n o n l y b e u s e d f o r s c i e n t i f i c r e s e a r c h . N o c o un t r y o r r e g i o n i s a ll o w e d t o __ ___ _______ _ t o a n y p a r t o f i t .