单选题
Most of the waiters are ______ in their work because the owner of the restaurant does not pay them on time.
【正确答案】
C
【答案解析】[解析] 本题空格处是说多数的侍者在松松散散地工作。C项“slack松散的，疏忽的”符合题意，如：She was shocked at the slack discipline in the school(对于学校松弛的纪律她感到震惊)。其他三项“rack行李架”，“tack大头针”，“stack一堆”都不正确。所以，本题选C。