I didn’t quite follow him because he explained the theory _____that is too abstract for me.
34. We are living in an age ____________ we treasure very much, because it sees man’s rapid development.
33. With April 18’s railway speedup, highway and air transport will have to compete with __________ service for passengers.
32.An air France jet is reported________in the Atlantic Ocean with 228 people aboard,the airline’s worst disaster in its 75-year history.
31. A wonderful idea suddenly occurred to me _______ I would turn to the reference book to finish my homework
30. “It is not only you but also Tom who _________,” said the teacher after knowing what had happened.