The US Bush administration, says the scientific uncertainty over the pace of climate change is causes for ______.

A．She was greeted warmly by the large audience.
B．She met a lot of old friends.
C．She felt excited to find he knew everyone there.
D．She felt quite sad that he was a stranger there.

A．Soft water contains more dissolved minerals.
B．Hard water contains more dissolved minerals.
C．Hard water is not drinkable.
D．Soft water is easier to drink.