1-If someone offered to buy you one of those rings ,which you (choose)..... 2-the flight may be cancelled if the fog(get) .....thick 3-if the milkman(come)...., tell him to leave two pints 4-i(call) .....the office if were you 5-someone (sit) ....on your glasses if you leave them there 6-you would hear my explanation if you (not talk)....... so much 7-what you(do)..... if you hear the burglar alarm 8- if you(read)......... the instructions carefully ,you wouldn't have answered the wrong question 9- if Mel (ask)...... her teacher,he'd have answered her question 10-,I would repair the roof myself i(have)....... a long ladder 11- unless they turn that radio off,i(go)..... mad 12-if you were made redundant ,what you(do)..... out of petrol here 13- we'll have a long way to walk if we(run)...... out of petrol here 14-if you shake that bottle of port,it (not be)....... fit to drink 15- if you spoke louder,your classmates ( understand) ....you 16 I'll probably get lost uncles he(come) ..... with me 17- you(not have)...... so many accidents if you drove more slowly 18-if you(wear)........ a false beard nobody would have recognized you 19- if you (leave)...... the fish here ,the cat will eat it 20- you(have)...... no trouble at school if you had done your homework!!!!!NẾU ĐƯỢC THÌ GIẢI THÍCH HỘ MÌNH LUÔN NHA