21. The tech industry expo, which attracted more than 180, 000 people, was a reminder of the tech industry is best at: being optimistic about itself.
A. that
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B. how
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C. what
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D. which
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22. Time magazine has chosen “The Guardians”,a group of journalists who____ for their work, as Person of the Year, for taking great risks in pursuit of greater truths.
A.will target B.have targeted
C.will be targeted D.have been targeted
23. Being an experienced lecturer, Mr. Black____ his speech to suit a younger audience.
A. simplified B. addressed C. exchanged D. delivered
24. Bella, who is always cheerful, creates a friendly work atmosphere in her office every day,____ her colleagues find pleasant and relaxing.
A.where B.which C.when D. that
25. ---Can you help me with my English homework? You're a genius.
---__________, but I'll try to help you. What's your problem?
A. Far from it B. You bet C. By all means D. It's out of question