Bamboo, which is a common plant in the south, is used ______ in buildings, food, furniture and so on. It is used to make clothes as well.

One of the great things about science is that it has taught us to be __________ about surface appearances. The world seems flat, but it is, in fact, round.

After five days of fantastic space trip, the two astronauts walked out of the spaceship, _____.

My niece cares more for new clothes than anything else in the world, so she is very _______ about what she wears.

       about the journey, I was unsettled for the first few days.