单项选择题
（）for the Olympic Games begins about ten years in advance.
A.Bid B.To bid C.Bidding D.To be bidden
单项选择题 Ann is studying（）at university.
单项选择题 The（）is concerned with successful election, whereas the statesman is interested in future of his people.
单项选择题 The next train to Beijing（）here at 3 o'clock.
