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

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1 The result was the abolition in February 1844 of the Secret Office which for generations had been intercepting letters of possible interest to the government .
2 Thus when there was demand for training youth in drama the holder of the purse , the government , turned for advice not to educationalists , not to speech and drama experts ( although there was some overlap here ) , but to a small group of charismatic figures who for decades had been promoting community drama of one sort or another , promoting it by giving advice , by running courses , by setting up drama libraries of play-texts , by making links with professional theatre , by popularising competitive festivals .
3 Biotechnologists at the Institute of Microbiology of the Chinese Academy of Sciences have been testing rice modified to resist the red stripe virus , which can destroy entire harvests in Southeast Asia .
4 The Society needs more teachers ; many of teachers have been taking classes for 20 years or more !
5 Walter Stocker , the head of the Red Cross team trying to deal with the refugee crisis in the central African state , said hordes of peasants had been trekking south since guerrillas of the Rwanda Patriotic Front broke a seven-month ceasefire and attacked army positions on 8 February .
6 For example , if the words prior to dogs/clogs had been raining cats and then it would be fairly safe to say that the intended word was dogs .
7 The most interesting effect in Kleiman 's experiments emerged when the shadowers were asked whether a sentence such as Pizzas have been eating Jerry made any sense .
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