Many people attend various public lectures, chiefly ______ themselves familiar with the latest development of different fields.
B
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_____ofwatermakesDeathValleyadesert,butitisbynomeansdevoid.
Manypeopleattendvariouspubliclectures,chiefly______themselvesfamiliarwiththelatestdevelopmentofdifferentfields.
Thereweremanymorepeoplewhogotinjuredinthebigfirethan_______.
Generallyspeaking,thehardoneworks,_______.