It is perhaps not an exaggeration (to say) that we shall soon (be trusting) our health, wealth, and happiness to elements with (whom) very name the general public (are) unfamiliar.

单项选择题(Not) too many years ago, it was an (excited) experience (to travel) 25 or 50 miles (away from) home.

单项选择题Sam (used to live) in Oklahoma, (but) his company (had him transfer) (to a better) position in Georgia.