Example sentences of "is [verb] [prep] a long period " in BNC.

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1 The performance of the housewife role in adulthood is prefaced by a long period of apprenticeship .
2 Ethnographic research has special qualities suited to dealing with controversial topics in sensitive locations , for it entails a gradual and progressive contact with respondents , which is sustained over a long period , allowing a rapport to be established slowly with respondents over time , and for researchers to participate in the full range of experiences involved in the topic .
3 " I love foliage and I think you have to rely a lot on that in small gardens because you do n't have room to leave dormant areas where nothing is happening for a long period , " she says .
4 Also in the crypt is the Duomo treasury , a pay-to-enter collection that is closed for a long period at lunch .
5 ( c ) Ensure that no voucher is retained for a longer period than 14 days from receipt .
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