How are the family roles changed?
The dependent parents are cared for as ff they were _____.
The fact that tunnels for subways are also painted in the picture shows that as a cubist Joseph Stella paints the bridge in_______.
The spy admitted to __________(曾向敌人提供情报).
What does the mystery of the bridge refer to?
Malaspina, the largest Alaskan glacier, covered an area of more than ______.
Sometimes children have trouble ____ (把事实和想像区分开来) and may believe that such things actually exist.