Correct: fern, burn, birth, skirt, third, nerd, burp, burst, birdsong, after, alert, sturdy, lobster, copper, scatter, insert, confirm, administer, disturb, overhaul, absurd, Incorrect: card, farm, scar, far, party, market, carpet, garland, garlic, disarm, discard, hard, reorder, hornet, form, for, door, report, cord, doctor,

R-controlled vowels ( er, ir, ur ) make the /er/ sound

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恢復自動保存: ?