Example sentences of "have been [v-ing] [prep] these " in BNC.

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1 Soviet oilmen have been tapping into these supplies since the 1940s , when they created Oil Rocks , a gigantic production centre with 200 kilometres of causeway , built on concrete piles and landfill offshore .
2 ‘ Sir , ’ said a voice , ‘ in your place , I would have refreshed myself some inches upstream from my feet , for I have been walking in these boots for months , and the juice flowing away from me can not be sweet .
3 How can teachers be prepared to undertake the process of pragmatic mediation that I have been proposing in these chapters ?
4 Mr Ed Sweeney , Bifu 's deputy general secretary , said yesterday : ‘ Both banks have been working on these cuts for months and then choose today to axe jobs . ’
5 Scholars from various disciplines have been working on these problems since the mid-1940s .
6 They have been waiting for these choice morsels — dessert .
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