O o (fox) 【short vowel 短母音】

Some more examples(更多例字):
• CVC (子音-母音-子音): Bob, cob, gob, job, mob, rob, sob, bog, cog, fog, cod, god, hog, jog, log, cod, nod, pod, rod, sod, mom, Tom, Don, won, cop, hop, mop, pop, sop, top, cot, dot, got, hot, jot, lot, not, pot, rot, box, fox, pox

• on, ox, knob, blob, glob, slob, snob, throb, odd, clod, plod, prod, on, bond, fond, pond, clog, frog, smog, dock, lock, mock, rock, sock, tock, block, clock, flock, stock, shock, knock, doll, chop, shop, flop, plop, slop, stop, crop, drop, prop, blot, clot, plot, slot, spot, shot, knot, trot