Mark the letter A, B, C, or D on...

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
My head teacher has grave doubts as to whether I would pass my university entrance examination. I myself feel so worried.

A. personal

B. serious

C. private

D. specific