Tosucceedinascientificresearchproject________.
A、oneneedstobepersistentMatteristhename________(give)toeverythingwhichhasweightandoccupiesspace.
Ishallneverforget________(meet)thelatePremierZhouduringhisinspectionofourfactory.
Iwonderifhecouldgetit________(do)beforetomorrow.
Howlong________they________(dig)theditch?
Hotmetal________asitgrowscooler.