单项选择题

A well coherent discourse ______ good choice of cohesive devices and semantic selection among other things.

A．calls for
B．calls on
C．calls up
D．calls forth
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单项选择题
According to the conversation the best way to learn a foreign language is to ______ .
A．go abroad and contact with the native speaker
B．do much more practice
C．practise with good tutors
D．adopt suitable methods
单项选择题
Which of the following is NOT true according to the conversation
A．There is no link between coffee and heart disease.
B．Caffeine can cure headache.
C．Tea has less caffeine than soda.
D．Addicted people without caffeine will get headache.
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