单项选择题Which of the following statements concerning banning GM foods is true according to the passage
单项选择题We can learn from the first paragraph that _____________.
单项选择题Which of the following records has been a source of information in the author's investigation
单项选择题It can be inferred from the passage that easy conclusion (Para. 3 ) is based on the assumptions that
单项选择题According to the passage, which of the following is true of wages in southern cities in 1910
单项选择题The primary purpose of the passage is to __________.
单项选择题According to Harris Miller, __________.
单项选择题According to the passage, who can get H-1B visas
单项选择题Why is the UK government's move to attract foreign high-tech workers criticized
单项选择题It can be inferred that in Germany __________.