If you do it ______ , do it well.

A．Scientists have a sound knowledge about the diversity of species.
B．Scientists don’t know much about the number of stars in the galaxy.
C．Scientists show more interest in stars in the galaxy than in species on Earth.
D．Scientists don’t agree on the number of species in the world.

A．He is the owner of a famous Piccadilly arcade.
B．He is the owner of Piccadilly’s famous arcade.
C．He is the owner of a jewellery shop.
D．He is the assistant of a jewellery shop.