单项选择题
A．your friends is too busy to read a letter B．your friend hates to receive a letter C．your friend is not worthy of your letter D．your friend should not have written you a letter
A．every American cannot have guns B．only soldiers and police can have guns C．every American citizen can own guns D．teachers have no money to buy guns
A．buildings by the ancient standards B．all the buildings by the ancient standards C．all the modern buildings by the ancient standards D．modern buildings