The parents were unsettled for the first few days, about their son's safety. [ ]
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![The parents were unsettled for the first few days, about their son's safety. [ ]](/pic/43_1425929.jpg)
The parents were unsettled for the first few days, _____ about their son's safety. [ ]A. having worried
B. to worry
C. being worried
D. worried
试题答案
D