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【題目】—I’m still working on my project.

【題目】—Could you tell me ________ we will go to the concert tomorrow?

【題目】Mrs. Morris has left for London. She ________ a speech there next week.

【題目】Has she ever asked for the reason________ may explain his coming late？

【題目】It was thought to be ______ adventure for him to walk across ______ Sahara Desert alone.

【題目】The teacher said ____ Tom was an honest boy and ____ he will be our monitor.

【題目】Nearly a century later，extensive observations_______that elephants indeed remember injuries and hold hates against their abusers．

【題目】一Julia，you look upset．What's up？

【題目】Only ______ a human being.

【題目】All the ______ at the party were his supporters.