Mrs.Smith finds it hard to clear up the mess，as her children are always whenever she trie

Mrs.Smith finds it hard to clear up the mess，as her children are always whenever she tries to. (2013·福建，29)
A. in the way
B. on watch
C. in sight
D. on the line

(答案→)A. in the wayB. on watchC. in sightD. on the line解析：句意为：Mrs.Smith发现很难清理混乱局面，因为当她尽力清理时她的孩子总是妨碍她。in the way妨碍；on watch值班，监视；in sight在视力范围内，在即；on the line处于危险中，(对方)在接电话。

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