The group’s research has done much to      our knowledge of the HIV virus．
A．a(chǎn)dvance B．pullC．rushD．a(chǎn)dopt
A
動詞辨析。A推進(jìn)，增加；B拉；C突襲；D收養(yǎng)，采用；句意：那一群研究人員已經(jīng)做了很多事情來增加我們在艾滋病毒方面的知識。故A正確。
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