Click the player and start listening There are two players. The player one is for listening Part A and the player two is for listening Part BClick the players and start listening: Current Page 1 Page 2 Complete 31 The speaker says the main topic of the lecture is A the history of monosodium glutamate. B the way monosodium glutamate works. C where monosodium glutamate is used. 32 In 1908, scientists in Japan A made monosodium glutamate. B began using kombu. C identified glutamate. 33 What change occurred in the manufacture of glutamate in 1956? A It began to be manufactured on a large scale B The Japanese began extracting it from natural sources C It became much more expensive to produce. Next Page > Log in or register to post comments