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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】（2006陕西﹚He hurried to the booking office only _____ that all the tickets has been sold out.
A.
to be told
B.
to tell
C.
told
D.
telling
【单选题】（2006四川﹚—Is Jack on duty today?—It______be him.It’s his turn tomorrow.
A.
mustn’t
B.
won’t
C.
can’t
D.
needn’t