单选题 Human facial expressions differ from those of animals in the degree to which they can be deliberately controlled and modified.
A. sufficiently B. noticeably C. intentionally D. absolutely

【正确答案】 C
【答案解析】[解析] deliberately和intentionally意思相同：故意；蓄意地。sufficiently：足够地；充分地。noticeably：明显地，易见地。absolutely：绝对地。He's absolutely correct. 他绝对正确。