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.
Professor Berg was obliged to delete his project after his son had died.
A. volunteered
B. changed
C. forced
D. decided
Chọn C
“oblige” = “force”: bắt buộc, bắt phải…