单项选择题

· You will hear a conversation about quality control.
· For each question 23-30, mark one letter (A, B or C) for the correct answer.
· After you have listened once, replay the recording.

How to check the quality during production

A． check every one
B． take samples to check it
C． check it at random

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单项选择题When will Mr Janson arrive in Singapore

· You will hear a conversation about quality control.· For each question 23-30, mark one letter (A, B or C) for the correct answer.· After you have listened once, replay the recording. How to check the quality during production 您的浏览器不支持 audio 元素。