How do I add a label or labels to my "Expiration Month" and "Expiration Date" drop-down lists?

Also, what is the best way to position them?

Should I make each one an <LI> ??

Here is my code...

Code HTML4Strict:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
	<head>
		<title>Payment Form</title>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
		<link type="text/css" rel="stylesheet" href=".css">
		<style type="text/css" >
			form{
				width: 400px;
				margin: 0 auto;
			}
 
			fieldset{
				margin: 1.5em 0 0 0;
				padding: 0;
			}
 
			legend{
				margin: 0 0 0 1em;
				color: #000000;
				font-weight: bold;
			}
 
			fieldset ol{
				padding: 1em 1em 0 1em;
				list-style: none;
			}
 
			fieldset li{
				padding: 0 0 1em 0;
			}
 
			fieldset.submit{
				border-style: none;
				padding: 0 0 0 12em;
			}
 
			label{
				float: left;
				text-align: right;
				width: 10em;
				margin: 0 1em 0 0;
			}
 
		</style>
	</head>
	<body>
		<form action="process_payment.php">
			<fieldset>
				<legend>Billing Details</legend>
				<ol>
					<li>
						<label for="firstName">First Name:</label>
						<input id="firstName" name="firstName" class="text" type="text" />
					</li>
					<li>
						<label for="middleInitial">M.I.:</label>
						<input id="middleInitial" name="middleInitial" class="text" type="text" />
					</li>
					<li>
						<label for="lastName">Last Name:</label>
						<input id="lastName" name="lastName" class="text" type="text" />
					</li>
					<li>
						<label for="address1">Address1:</label>
						<input id="address1" name="address1" class="text" type="text" />
					</li>
					<li>
						<label for="address2">Address2:</label>
						<input id="address2" name="address2" class="text" type="text" />
					</li>
					<li>
						<label for="city">City:</label>
						<input id="city" name="city" class="text" type="text" />
					</li>
					<li>
						<label for="state">State:</label>
						<input id="state" name="state" class="text" type="text" />
					</li>
					<li>
						<label for="zip">Zip:</label>
						<input id="zip" name="zip" class="text" type="text" />
					</li>
					<li>
						<label for="teleNo">Telephone No.:</label>
						<input id="teleNo" name="teleNo" class="text" type="text" />
					</li>
					<li>
						<label for="email">Email:</label>
						<input id="email" name="email" class="text" type="text" />
					</li>
				</ol>
			</fieldset>
 
			<fieldset>
				<legend>Credit Card Details</legend>
				<ol>
					<li>
						<label for="cardNumber">Credit Card Number:</label>
						<input id="cardNumber" name="cardNumber" class="text" type="text" />
					</li>
					<li>
					<select name="expMonth">
						<option></option>
						<option>01</option>
						<option>02</option>
						<option>03</option>
						<option>04</option>
						<option>05</option>
						<option>06</option>
						<option>07</option>
						<option>08</option>
						<option>09</option>
						<option>10</option>
						<option>11</option>
						<option>12</option>
					</select>
					<select name="expYear">
						<option></option>
						<option>2011</option>
						<option>2012</option>
						<option>2013</option>
						<option>2014</option>
						<option>2015</option>
						<option>2016</option>
						<option>2017</option>
						<option>2018</option>
						<option>2019</option>
						<option>2020</option>
					</select>
					<li>
						<label for="cvv">CVV Code:</label>
						<input id="cvv" name="cvv" class="text" type="text" />
					</li>
				</ol>
			</fieldset>
 
			<fieldset class="submit">
				<input class="submit" type="submit" value="Process Order" />
			</fieldset>
		</form>
	</body>
</html>

Thanks,



Debbie