Thisdiploma(毕业文凭)________thatyouhavecompletedhighschool.
A、entitlesThemorewelookedatthepicture,________.
Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
Ifound________toanswerallthequestionswithinthetimegiven.
Ishallneverforget________(meet)thelatePremierZhouduringhisinspectionofourfactory.
heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
