(2013·福建高考)Mrs.Smith finds it hard to clear up the mess, as her children are always whenever she tries to.
A. in the way
B. on watch
C. in sight
D. on the line
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(答案→)A. in the way
B. on watch
C. in sight
D. on the line
解析：A 句意：史密斯太太觉得很难把杂乱的东西收拾好，因为无论她什么时候试图整理，她的孩子们总是碍手碍脚。本题考查介词短语辨析。A：挡道；B：值班；C：看得见；D：冒风险。故答案为A项。