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Ⅰ.单项填空 1．—David will win the first prize? —Are you sure? —________.He’s always working hard. A．It’s my guessB．It’s up to you C．That depends D．It’s hard to say 2．—Well，Jack，I’m sorry but I have to go home. —________.I hope to hear from you soon. A．Enjoy yourself B．Keep in touch C．Don’t be so sad D．So am I 3．As we all know，theory is based on practice and________serves practice. A．in nature B．in return C．in turn D．in fact 4．Such habits as smoking and cheating，once________，are hard to get rid of. A．forms B．forming C．having formed D．formed 5．—Can you remember________some unpleasant things about her? —Yes，but I didn’t mean________her. A．saying；to hurt B．to say；hurting C．to say；to hurt D．saying；hurting 6．The old man sitting opposite me cleared his throat as if________ something. A．said | 
