At the beer-drinking contest the winner drank an average of 10 bottles of beer at the first 20 rounds. After a further 20 rounds the average increased to 15 bottles. What is the average for the last 20 rounds

填空题as a result

填空题summer

填空题The phrase “the tip of the iceberg” roughly means ________.

填空题situated

填空题flash

问答题Mother gave Alice 30 dollars. She spends a fifth of the 30 dollars on books, a quarter of the remainder at a hairdresser’s and buys a new skirt for 10 dollars. How many dollars does she have now

问答题John runs faster than Bob but slower than Tom. Bill usually runs faster than Bob, sometimes runs faster than John, but never faster than Tom. Who is the fastest runner

问答题Helen is twenty years old, and her age is four times as much as Mary’s. When Helen’s age is twice as much as Mary’s, how old is Helen then

问答题If you count from one to two hundred, how many eight’s will you meet on the way

问答题我们愿意借此机会，对你们的帮助表示衷心的感谢。 ______________________________________________________________.