80.It was not until 1920 ______ regular radio broadcasts began.

A. while　　 　　　B. which　　 　C. that　　 　　　D. since　　 　

79.I was disappointed with the film . I had expected ______ to be much better.

A. that　　 　　B. this　　　 　C. one　　 　　　　D. it　　　

78.It was not _____ she took off her glasses _____ I realized she was a famous film star.　

A. when , that 　 B. until , that 　　C. until , that　 　　D. when , then　　

77.Does ______ matter if he can’t finish the job on time?

A. this　　　 　B. that　　 　　C. he　　　 　　　　D. it　　　

76..I don’t think ____ possible to master a foreign language without much memory work.　　　

A. this　　　　 　B. that　　 　　C .its　　　 　　　D. it　　　

75.Is ____ necessary to complete the design before National Day?

A. this　　 　　 B. that　　 　　　C. it　　　 　　D. he　　

74.Was it during the Second World War_____ he died?　　　　

A. that　　 　　 B. while　　　　 C. in which　　 　　D. then　　

73.Joan had often heard____ said that Marley had no money.

A. it 　　　　　　　B. this 　　　　　　C. that 　　　　　　　D. one

72. I hate___ when people talk with their mouths full.

A. it 　　　　　　　B. that 　　　　　C. these 　　　　　　D. them

71.The Parkers bought a new house but ____ will need a lot of work before they can move in.

A. they 　　　　　　B. it 　　　　　　　C. one 　　　　　　　D. which