Look! A ________ woman was coming.

One of the customs officers, who was watching the arrivals very ________, saw feathers ________ from under a woman’s coat.

 Nature reserves are very important for preserving many animals and plants, which would _______ run the risk of becoming extinct.

Private cars really provide much convenience to people, and ___ they cause too many problems.

Polar bears live_______ on sea ice，which they use as a platform for hunting seals