Who’s the woman in white—-Ms Iris. She teaches ______ English. Whenever I have trouble, I always ask ____ for help. She is very nice.

The radiation amount of a mobile phone for twohalf-hour periods per day is equal to ______ to an X-ray for ten seconds.

The air in the country is ________ than ______ in the big city.

The popular American film Avatar, set in 2154, ______ place on a planet called Pandora

_____ everybody knows about it, I don’t want to talk any more[ ]