7、t____________mysister____________asavolunteerteacherinthemountainvillagetwoyearsago.(二)根据汉语提示,写出英语句子。A(2013·辽宁大连)1.大连有多少人口??2.杰克不在家,他在图书馆看书。Jack isn't at home. 3.我们的教室一天打扫两次。 4.现在很多人喜欢乘坐高铁(high-speed train),因为它更快。5.尽管山很高,但我相信我最终一定能到达山顶。,though it is very high.B(2