—The pollution problem here seems to get more and more serious.
--Yes. Something_____about it.
A.must doB.must be done
C.is doingD.had been done
B
考查時(shí)態(tài)及語(yǔ)態(tài).句意:這兒的污染問(wèn)題單好像越來(lái)越嚴(yán)重.——是的,對(duì)此必須做些什么。下文主語(yǔ)是動(dòng)作對(duì)象,故用被動(dòng)語(yǔ)態(tài),結(jié)合語(yǔ)境可知選B。
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