The United States ________ a population of around 300 million.
A. is
B. are
C. has
D. have
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Tom as well as his two friends _____________ invited to the party.
A. was
B. were
C. have
D. had
Next time you see a pigeon flying __________ the sky, look at it carefully!
A. by
B. under
C. across
D. on
_____________ by the story about li Ziqi's success, I have decided to run an online shop.
A. Inspiring
B. Inspired
C. Inspiration
D. Inspire
Quality is our best ____________ (commit) to our customers and the life of our company.