The ship went down although strenuous efforts were made to save it A. exhausting
Giải thích
Đáp án D.
- strenuous (adj): tích cực >< half-hearted (adj): nửa vời, không nỗ lực hết mình
Ex: He made strenous efforts to pass the entrance university exam.
- forceful = assertive (adj): quyết tâm
Ex: a forceful personality.