单项选择题
There are approximately 500 （） now in operation in the United States.
A.savings banks B.saving bank C.saving banks D.savings bank
单项选择题 Our factory is much more productive now. This year’s production is five times as much （） it was ten years ago.
单项选择题 When you write, （） all the necessary information.
单项选择题 Several people, （） I listed below, have not submitted their reports.
