年轻恒牙的X线牙片显示，未发育完成的根尖开口区有界限清晰透影，周围有完整骨硬板围绕，临床无异常症状。应提示为
C
暂无解析
Bothofmybrothersarenowmarried，soIhavetwo_____.
Theoceansdonotsomuchdividetheworld_______uniteit
Itisimportantto________yourskinfromtheharmfulstrongsunlight.
句子写作：Iwasveryembarrassed.Ididn’tknowwhatIshoulddo.
Williamhascuthissmoking_____tofivecigarettesaday.