People have learned a lot fromstudies．
A．scienceB．scientific
C．scientistD．sightseeing
B

試題分析：句意：人們已經(jīng)從科學(xué)研究學(xué)到了很多。分析選項(xiàng)音標(biāo)與詞意：A. science['sa??ns] 科學(xué)；B. scientific[sa??n't?f?k]科學(xué)的；C. scientist ['sa??nt?st] 科學(xué)家；D. sightseeing['sa?tsi???]觀光。聯(lián)系句意為科學(xué)的研究，因此運(yùn)用形容詞形式。故選 B
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