Example sentences of "[noun] mark [vb -s] over the " in BNC.

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1 But a question mark hangs over the technology of ‘ holophonics ’ , which the inventor explains by expounding a new theory of human hearing .
2 A large question mark hangs over the government 's intention to ever use contract compliance .
3 Although many of the main ingredients for a successful first challenge from Spain are clearly in place , a question mark hangs over the afterguard of the boat .
4 A big question mark hangs over the wisdom of visiting any Arab state at present , writes Mike Harper .
5 An even bigger question mark hangs over the proposed Channel Tunnel railway between St Pancras station and the coast , given the enormous controversy the project has already raised among dwellers along the various routes proposed .
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