（届山东省济宁市曲阜师大附中高三上学期期中考试英语试卷）
It' s a pity that there are many teenagers _____only on-line activity is chatting with their e -pals !
| A．who | B．that | C．which | D．whose |
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（届山东省济宁市曲阜师大附中高三上学期期中考试英语试卷）
It' s a pity that there are many teenagers _____only on-line activity is chatting with their e -pals !
| A．who | B．that | C．which | D．whose |
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