Williamhascuthissmoking_____tofivecigarettesaday.
A、downA
cut down “削减，减少 ”;cut sth. down to “ 把⋯⋯ 减到(什么程度) ”，是固定搭配，而且符合题意。
I‘vebeentellingyou_____nottodothat，butyounevelistenedtome.That’swhyyougotintotrouble.
_____alltherepresentativesstillnotthere，themeetingwaspostponedforseveralhours.
Copernicusmaintainedthattheearth_____roundthesun.
Hedidn‘tseemtomind_____themusicwhilehewasstudying.
Theteachergave_____theexaminationpaper.
