Constructionoftherailwayshelpedtodevelopthenational_______ofTanzaniaandZambia.
________theconcerthadbegundidwerealizewhatasplendidshowitwasgoingtobe.
Theassociationis________toraisingfundstohelptheblind.
Othersarguethatsincetheearthhasenduredalongstringoficeagesinthelasttwomilliontothreemillionyears,anywarmingis________tobetemporary.
We must ______ that the experiment is controlled as rigidly as possible.