——I’msorry,butthere’snosmoking

——I’m sorry , but there’s no smoking on this flight ．
——Oh, I _______that ．Sorry , I won’t again ．

A．don’t know	B．didn’t know
C．won’t know	D．haven’t known

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相关试题

---Did you enjoy last night’s party?
---No. .

A．It couldn’t be more exciting	B．It couldn’t be more boring
C．It couldn’t be more impressive	D．It couldn’t be more anxious

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To be honest, I would rather my dog out, which made so many troubles.

A．not had let

B．I had not le

C．not let

D．not have let

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Jack is late again. It is of him to keep others waiting.

A．typical

B．common

C．ordinary

D．normal

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Jack, who pretended , heard, however, every word that was said.

A．not listening

B．not to be listened

C．not to be listening

D．not having listened

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The old man __________ in Tibet for two years as a volunteer teacher；it is an experience he often mentions.

A．served

B．serves

C．is serving

D．has served

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