I have been working in architecture for a while; here is a building when I designed by

Which of the underlined words or phrases is INCORRECT? Last month, Amy watches three documentaries about Saudi Arabia to…

If he… ............. harder, he would have passed his examinations.

Hannah ................. to write a good paper until her second year at university.

Sara: Help! I lost my key and can't get into my house! Mona: Don't worry, I... ............. send my son to help…

In which sentence is all CAPITALIZATION correct?