He asked me whether my brother ________ (fly) to Beijing.
had flown
暂无解析
Howlong________they________(dig)theditch?
Ishallneverforget________(meet)thelatePremierZhouduringhisinspectionofourfactory.
Hardlyhadhefinishedhisspeech________theaudiencestartedcheering.
Tosucceedinascientificresearchproject________.
Night________(fall),wehurriedhome.