Investors were seriously ……………….. when the stock market began to crash. worried9/50Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. Investors were seriously ……………….. when the stock market began to crash.worriedworryworryingworriedlyGiải thíchChọn A. worried Tính từ mang nghĩa bị động, dùng với chủ từ chỉ người