Text for test. Text for test. Text for test. Text for test. Text for test. Text for test. Text for test. Text for test. Text for test. Text for test. Text for test. Text for test. Text for test. Text for test. Text for test.
ADDED CSS CODE :
input[type='radio']:focus+label {
    display: block;
    border-width: 1px;
    margin: 1px 0;
    background-color: #ccc;
}
input[type='radio']:focus+label:after {
    content: '?';
}
input[type='radio']:focus:checked+label {
    margin: 0;
}
input[type='radio']:focus:checked+label:after {
    content: '';
}