Please help me anawer the questions!

19.With the help of fire-fighters, the fire was _extinguished_____ very quickly.

A.extinguishing B.extinguishes C.extinguish D.extinguished

20.I _asked______ her to do this for me but she did not.

A.ask B.asking C.asked D.asks

21.the washing machine often ___breaks____ down.

A.break B.breaking C.breaks D.none of the above

22.Peter and Mary always __do_____ their homework after dinner.

A.do B.does C.is doing D.doing






i am 100% sure i got all this right!

2006-10-15 15:16:14 補充：
19.is extinguished because it has the word " was" that means it is past tense.20. is asked because it is also past tense.how we know?well,it says"she did not"DID is a past tense,so we need to use ask as a past tense which is asked.

2006-10-15 15:16:56 補充：
21. is breaks because it is often,so it is always,and so it is not past tense,it is present tense.Also,the washing machine is a single noun,there is only ONE washing machine,so we need to add S behind break,which is breakS.

2006-10-15 15:19:12 補充：
22.is do because there are two people(Peter and Mary)and that's why we don't use does.We don't use is doing and doing because there is no is or are in the sentence.For example,if the sentence is " She is _______ her homework,then it will be d.doing.

19. D
20. C
21. C
22. A

19.A

20.B

21.C

22.A

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