It has been evident that too many children in the city are left when their development requires parents’ close attention.
A. alone
B. off
C. out
D. behind
网友回答
(答案→)A. alone
B. off
C. out
D. behind
解析：
这题考查词组辨析：Leave alone 听其自然，不管，leave off停止，leave out遗漏，leave behind留下，句意是：很显然，城市里的很多孩子在发展需要父母密切关注时，却被置之不理。选A。