The Food and Drug Administration      that anyone who      too much the drug
suffer side effects.
A．warned; took; willB．has warned ;takes; may
C．warns; took; mustD．has warned; will take; need
B
考查時(shí)態(tài)。句意：食物和藥品管理局已經(jīng)警告了吸毒太多的任何人可能會(huì)遭受負(fù)面影響。吸毒的動(dòng)作在警告之前，從句用的一般現(xiàn)在時(shí)態(tài)，之前的動(dòng)作為現(xiàn)在完成時(shí)態(tài)；可能性的推測(cè)用may，所以選B。
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