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.    

John, along with twenty friends, ………. planning a party.

• A. A. are
• B. B. is
• C. C. were
• D. D. have been

S1 + along + S2 => động từ chia theo S1
S1 là John => danh từ số ít => động từ chia số ít
=> B