15. Every time I passed boys who were playing basketball, I stopped _____ them

A. to silently watch　　　 　 B. silently watching　 C. watching silently　 D. to watch silently

14. My sister read a _____ story in three minutes on the day before her exams.

A. five pages　 　　　 B. five-page　　　　 C. five page　　 　　 D. five-pages

13. The final exam is drawing near. Our physics teacher gave us _____ tests as usual.

A. twice many　　　 B. as many twice 　　 C. twice as many　　 D. as twice many

12. Last week, a boy fell into a river during a holiday trip. The _____ happened when he tried to pass by other classmates on a narrow path by the river.

A. incident　　 　　 B. affair　　　 　　　　　　 C. business　　 　　 D. accident

11. _____ his first appearance in 1939, the cartoon character has proved to be a lasting favourite in comic books and on the silver screen.

A. As　　　　　　 　　 B. On　　　　　 　　　 C. Since　　 　　　　 D. For