1377 1128 1724 1239 1171 1061 1455 1750 1235 1866 1666 1015 1511 1457 1546 1062 1847 1426 1387 1898 1019 1685 1309 1069 1000 1375 1976 1960 1553 1593 1607 1021 1847 1024 1113 1792 1882 1609 1911 1737 1614 1576 1503 1076 1952 1155 1325 1011 1625 1404 1959 1873 1672 1031 1159 1493 1881 1362 1605 1440 1107 1114 1773 1603 1161 1135 1203 1960 1489 1458 1761 1421 1020 1025 1221 1182 1061 1762 1421 1230 1372 1702 1374 1451 1654 1511 1861 1055 1715 1508 1546 1264 1986 1441 1390 1990 1038 1338 1354 http://library.phcsuphan.ac.th/search.usisassist.php?fromrefcode=&keyword=%20English%20language%20Problems,%20exercises,มีปัญหาในการเชื่อมต่อ/Connection Problems (open url)