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may have been good couldn’t have been worse can’t be better must be better
不填 ; the a ; 不填 a ; the a ; a
will listen shall listen will be listening should listen
may have been good couldn’t have been worse can’t be better must be better
That’s all right That's not bad That's a pity It's too disappointed
devoted generous educated reliable
the professor began the lecture the lecture began in no time we were attracted by the lecture immediately the bell announced the beginning of the lecture
Finishing his lecture To finish the lecture Having finished his lecture Finished the lecture
simple good secret personal
hoping hoped to hope hope
may have been good couldn’t have been worse can’t be better must be better
Come on Congratulations Good luck Never mind
educated devoted concerned relaxed
advantage purpose chance point
Were; would have had Had; would have had Had; would have Were; would have
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