Упражнение 326 на выбор между Present Perfect Continuous и Present Perfect

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Maria must inform the company's customers about the new webinar. She started making phone calls at ten o'clock. It's 3 p. m. now and she has twenty more phone numbers left.
She
 
 
a lot of phone calls.
She
 
 
phone calls since ten o'clock.
has been making
has made
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