考满分IELTS: 剑雅听力7Test 4Section4

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0 minutes 00:00
Listen and answer questions 31-40

Question 31-33

Choose the correct letter, A , B or C .

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.

Question 34-40

Complete the notes below.

Write NO MORE THAN TWO WORDS for each answer.

Monosodium Glutamate (MSG)

●MSG contains

- glutamate (78.2%)

- sodium (12.2%)

- (9.6%)

●Glutamate is found in foods that contain protein such as and 

●MSG is used in foods in many different parte of the world.

●In 1908 Kikunae Ikeda discovered a

●Our ability to detect glutamate makes sense because it is so naturally.

●John Frescott suggests that:

- sweetness tells us that a food contains carbohydrates.

- tells us that a food contains toxins.

- sourness tells us that a food is spoiled.

- saltiness tells us that a food contains