Oneoftherequirementsforafireisthatthematerial____toitsburningtemperature.
A
【句意】形成火的条件之一是该材料能够被加热到燃烧的温度。
【难点】A)项requirement 这个词和idea, suggestion等一样，要求从句里的谓语动词用(should)+动词原形。
____isnoreasonfordischargingher.
—Haveyoufinishedthework?
—Notyet,butnomatterhowharditis,we'llkeep___untilwemakeit.
Withonelegbrokeninthatcaraccident,hecannotevenwalk,____run.
Pollisanexampleofaseverelydisabledpersonwhohasbecome______atmanysurvivalskills.