1 . When asked, he__________ (承认)stealing the necklace.
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2 . ________ that he understands what is to be done.
A.Making sure | B.To make sure | C.Make sure | D.Having made |
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3 . The man spoke on the phone and I couldn’t ________ (辨认出) his voice. (根据汉语提示单词拼写)
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