英语高手教几道题目,悬赏30分1.Those exchange students are ___(most) from
英语高手教几道题目,悬赏30分 1.Those exchange students are ___(most) from Canada. 2.I don't ___(real) know what ___(do). 3.Star Shopping Mall closes at 10p.m.(同义句) Star Shopping Mall ___ closes ___ 10p.m. 4.Pollution is the biggest problem.(针对划线部分提问) ---------- ______ ______ is the biggest problem.