. Many people think that it is ____________making such an experiment.

Anyone who has spent time with children           the difference in the way boys and girls            similar situations.

Seeing the ______ dead cat, she was completely ______ and couldn’t say a word.

Not _______with the high marks in the exam, the determined student aimed high to get full marks next time.

Wolves are very ______: they can live in forests, on open plains, or in the snows of the Arctic.