Generallyspeaking,thehardoneworks,_______.

Theprofessorsaidhecouldtalkon_____interestedtheaudience.

Modernscienceandtechnologyhas_____communicationbetweenpeoplefarapart.

Withhiseyes______onthefamilyalbum,hethoughtofthefunhehadwhenhelivedwithhisparents.

Tina _____ have known the truth, or she would have told us.