When I got to the store, “iPhone 6 Plus” had been sold out. The salesmen didn’t know_____________.

To those_______ in martial arts(武术), the period from 1972 to 1975 is often said_______the Bruce Lee era.

12He said he was not optimistic the future of that country

Tom likes playing the guitar and he enjoys dancing .

The book is for the students ___ native language is not English.