（ ）1．—How long does it take us to go to your hometown from here?
—It takes us _________ hour or more to go to my home town by _________ train．
A．an；a B．a；an C．an；/ D．a；/
（ ）2．—Look，the boy is playing ____ the tree．
—It is not good for him to do so，for there are many young oranges _____the tree．
A．on；on B．on；in C．in；on D．in；in
