—How did you work out the Math problems?—Not able to ________ such difficult problems on our own, we had to turn to the teacher for help.
In our factory there are 2,000 workers, two thirds of _______ are women.
Your decision will affect your future study in college and your future job _______.
Mr. Smith likes traveling _______; but his wife enjoys _______.
---Would you mind if I _______ here? --- _______ . It’s not allowed.
All the students in our class made _______ progress by studying harder this term.