(2013·福建，29)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：考查介词短语。A项“挡道，妨碍”；B项“值班，监视”；C项“在视线中，被看见”；D项“在线上”。句意：史密斯太太发现想收拾一下那些乱七八糟的东西有困难，因为每当她想要做的时候她的那些孩子总是妨碍她。故选A。