Selecting Multiple Items in Listbox

Selecting multiple HTML Listbox's options

String strURL;
strURL="URL";

WebDriver firefoxDriver=new FirefoxDriver();  
firefoxDriver.get(strURL);

WebElement list1;  
list1=firefoxDriver.findElement(By.name("lst"));  

List<WebElement> lstOptions=list1.findElements(By.tagName("option"));  
list1.sendKeys(Keys.CONTROL);  
lstOptions.get(0).click();//Selects the first option.  
lstOptions.get(1).click();//Selects the second option.