A. research into sound reproduction. B. development of sound with movies.
C. disadvantages of synchronized sound. D. history of silent movies.
+ Which of the following is not mentioned as a producer of sound to accompany movies?
A: a Jazz Singer B. a single pianist C. a gramophone D. a small band.
+ She probably buys this house next week.
A. She may buy this house next week B. She must buy this house nexk week
C. She should buy next house next week. D. She doesn’t have to buy this house next week.