Add spaces: “Manybecomeinterested,andmanyparentstelltheirchildren,‘lookathowtheyworkandwhattheydo.’”

Answer: “Many become interested, and many parents tell their children, ‘look at how they work and what they do.’”

Add spaces: Fromthesereports,andusinghisowntechnicalskillsasamathematicianandasacraftsman,GalileobegantomakeaseriesoftelescopeswhoseopticalperformancewasmuchbetterthanthatoftheDutchinstrument.

Answer: From these reports, and using his own technical skills as a mathematician and as a craftsman, Galileo began to make a series of telescopes whose optical performance was much better than that of the Dutch instrument.

Add spaces: Thefourthphasewasfinalannihilationinthedeathandconcentrationcamps.1InDenmark,however,thisprocesswasnevercarriedout.

Answer:
The fourth phase was final annihilation in the death and concentration camps.1 In Denmark, however, this process was never carried out.