Which of the following statements are formal quotations? ( )
A: 'It takes me three weeks to prepare a good impromptu speech.' by Mark Twain .
B: Bertrand Russell said, 'It's preoccupation of possession that keeps you from happiness'.
C: My mum always said 'respect the old men'.
D: 'Make American great again' by Donald Trump.
A: 'It takes me three weeks to prepare a good impromptu speech.' by Mark Twain .
B: Bertrand Russell said, 'It's preoccupation of possession that keeps you from happiness'.
C: My mum always said 'respect the old men'.
D: 'Make American great again' by Donald Trump.
举一反三
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