Bài 18 — Nhập môn (A1)

<span style="width:22px;height:22px;border-radius:.35rem;background:#3182ce20;display:flex;align-items:center;justify-content:center;margin-right:.5rem;flex-shrink:0"> Nghe hiểu <span class="ms-auto me-2 badge" style="background:#3182ce25;color:#3182ce;font-size:.65rem">4

<span style="width:22px;height:22px;border-radius:.35rem;background:#0bc5ea20;display:flex;align-items:center;justify-content:center;margin-right:.5rem;flex-shrink:0"> Hội thoại <span class="ms-auto me-2 badge" style="background:#0bc5ea25;color:#0bc5ea;font-size:.65rem">2

<span style="width:22px;height:22px;border-radius:.35rem;background:#dd6b2020;display:flex;align-items:center;justify-content:center;margin-right:.5rem;flex-shrink:0"> Ngữ pháp <span class="ms-auto me-2 badge" style="background:#dd6b2025;color:#dd6b20;font-size:.65rem">5

<span style="width:22px;height:22px;border-radius:.35rem;background:#e53e3e20;display:flex;align-items:center;justify-content:center;margin-right:.5rem;flex-shrink:0"> Luyện nói <span class="ms-auto me-2 badge" style="background:#e53e3e25;color:#e53e3e;font-size:.65rem">5