Several swimmers have been drowned in the sea recently. So I don’t ____ of your going swimming alone. [ ]

Peter is ________of the three boys, buthe’s _______than the other two.

I wonder how it ____ that Chinese climbers successfully finished the torch relay on the Mount Qomolangma, where the air is so thin.

__confidence and the necessary equipment, they failed to rescue the 42 miners trapped in the coal mine.[ ]

The incomes of skilled workers went up ____, unskilled workers saw their earnings fall