问题
选择题
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
答案
答案：D
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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
答案：D