单项选择题
One and a half hour（）since we arrive. No one has come to meet us.
A.have passed B.was passed C.pass D.has passed
单项选择题 On my left（）a wide river; on my right, a dark forest.
单项选择题 On formal（）, people pay more attention to manners.
单项选择题 On average, a successful lawyer has to talk to several（）a day.
