<html><head><title>Bài tập trắc nghiệm</title><meta charset="utf-8"></head><body><center><table border="0"><tr><th><iframe src="https://drive.google.com/file/d/1TZXykoytTjOfnFPLqUFx9yuOUzdaLq5Q/preview" width="900" height="1000" frameborder="0" marginheight="0" marginwidth="0">Đang tải…</iframe></th><th>ocs.google.com<iframe src="https://docs.google.com/forms/d/e/1FAIpQLSf2caXLqVEHDiWzzSCOoCL_XvPUD1Qb-n9Pv_mMkTjWYjs3mA/viewform" width="420" height="1000" frameborder="0" marginheight="0" marginwidth="0">Đang tải…</iframe><center><font color="blue">Date: July 2, 2021 </font></center></th></tr></table></center></body></html>