When the telephone rang, I happened_____ a book.

(2009年合肥市高三第一次教学质量检测)It was the training he had as a young man made him such a good engineer

The boss has given everyone a special holiday, so we _____go to work tomorrow. [ ]

The world of Dinosaurs is an amazing film which bringsdinosaurs ________ on screen.

They arrived at a farmhouse, in front of ______sat a small boy.