Mark the letter A, B, C, or D on your answer sheet to indicate the cor

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.    

Robert is getting ready to realize his dream: opening a business ________ plants on the Internet. 

• A. A. sell
• B. B. sells
• C. C. selling
• D. D. sold

Rút gọn mệnh đề quan hệ. "A business which sells plants on the Internet."