单项选择题
A．mothers have the practice to go to work B．working mothers have no time to stay with their children at home C．mother's position in a family has been raised D．young wage-earners are economically independent
28（）A．tryingB．tryC．trialD．the trial
单项选择题28（）
A．trying B．try C．trial D．the trial
This passage talks mainly about（）A．Why the umbrella was...
单项选择题This passage talks mainly about（）
A．Why the umbrella was so popular in Europe B．When and how the umbrella was invented C．the history and use of umbrella D．the development of the umbrella
Which of the following statements is not true about the...
单项选择题Which of the following statements is not true about the umbrella（）
A．The umbrella was first invented to be used as protection against the sun. B．The umbrella changed much in style in the eighteenth century. C．No one exactly knows who was the inventor of the umbrella. D．In Europe, the Greeks were the first to use the umbrell
