Example sentences of "[noun sg] [is] [vb pp] [prep] be due " in BNC.

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1 The protective effect of HDL against atheroma formation is believed to be due to the HDL 2 subfraction ( Miller et al , 1981 ) .
2 People in northern climes , on the other hand , are unlikely to have been exposed to leprosy in every-day life and a positive result in the test is bound to be due to vaccination .
3 The youngest and most significant heating event is taken to be due to the crustal stretching in the mid Jurassic .
4 The anomalous heat is thought to be due to solar energy , which penetrates the surface ice in spring and warms the depths .
5 The reason for space is available at a traditionally busy time is said to be due to school holiday dates now being more staggered .
6 The decline is believed to be due to a combination of excessively dry summers in 1989 and 1990 , strong winds in late 1990 and a late frost in spring 1991 .
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