单项选择题
It is implied in the passage that a competent child ()
A.does what he is told B.plays with other children C.can perform certain task D.tells other children what to do
单项选择题 Instead of () sights, Edison would spend the time () in the public library.
单项选择题 It was () last week()I knew the news.
单项选择题 One of the sides of the board should be painted yellow, and () white.