heteachertoldthemsincelight________(travel)fasterthansound,lightning________(appear)togobeforethunder.
He________methathedecidedtoleaveonMonday.
Tosucceedinascientificresearchproject________.
Heaskedmewhethermybrother________(fly)toBeijing.
Ishallneverforget________(meet)thelatePremierZhouduringhisinspectionofourfactory.
Ipreferthisdiagram________thatone.