The girl looked at me with a ____expression. Maybe the problem was quite ___.

The children were warned of not being too __________ about things they are not supposed to know.

This is a(n)　　arrangement,not a permanent one.

—Mary is a(n)        painter .—So she is . She won a national award at the age of fifteen .

The Chinese river dolphin is one of the First-Grade State Protection animals, a (an)        mammal with its name – water panda.