Example sentences of "[noun pl] may [be] due to [noun sg] " in BNC.

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1 When contraception is not used , long pregnancy intervals may be due to breastfeeding and abstinence .
2 Speculation that the rapid decline of many of the world 's amphibians may be due to acid rain has been dampened by a study carried in the Rocky Mountains by the US Fish and Wildlife Service .
3 The advancing coasts may be due to emergence or to the development of constructional forms either organic or inorganic : they include , thus , shorelines which would have been classed by Johnson as emergent and as neutral .
4 Some plunging cliffs may be due to faulting , downwarping and volcanic flows of very recent date in tectonically mobile areas such as New Zealand .
5 These results may be due to chance , but the figures suggest that it is worth trying to do semi-automatic correction .
6 Unsafe working practices may be due to ignorance , and providing education and training about safer methods can help reduce the risk of exposure to blood-borne pathogens .
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