The machine is designed to _______ people recycle wastes to a great degree but the result still remains to be seen.
The first thing you must remember is that in order to succeed, it is almost compulsory that you ______ optimistic.
John can finish this task quickly ______ using better methods.
It may be necessary to stop _____ in the learning process and go back to the difficult points in the lessons.
The driver stopped his car so _____ that he was hit by the cab right behind him.
None of the students in the class likes the professor, who is used to being _____ of everything they do.