<div class="jumbotron bg-lite" style="background-color: white">
        <div class="row">
        </div>
        <div class="row">
            <div class="col-md-7">
                <h1>Phần 1</h1>
                <iframe src="https://drive.google.com/file/d/116ov9Se1NW5W72ieavoaIQDF1m2qHJ3L/preview" width="100%" height="850">
                    Đang tải…
                </iframe>
            </div>
            <div class="col-md-5">
                <h1 class="text-center">Trả lời</h1>
                <iframe src="https://docs.google.com/forms/d/e/1FAIpQLSe-EYdoIZmbjMcTMfkV1g_B_PnxGBhbGcEMwlB5OpohcVAW_w/viewform" width="100%" height="850">
                    Đang tải…
                </iframe>
            </div>
            <div class="col-md-5">
                <h1>Phần 2</h1>
                <div style="width: 100%;height: 850px">
                    <iframe height="100" width="80%" src="https://drive.google.com/file/d/1L9Ysm2S2a-ExkySzSAr0beVrei1z4287/preview"></iframe>
                </div>
            </div>
        </div>
    </div>