All possible means _______. However, nothing can _______ him dying of lung cancer.
I have done everything _____ was possible to do to prevent him from _____ the risk but in vain.
Now one of the most serious problems many people are worried about _____ on the lack of adequate housing space.
—I read the 21st Century Senior 2 Edition every day. —_____ no wonder that your vocabulary is so large.
Susan decided not to work on the program at home because she didn’t want her mother to know what she _____.
How often do you visit your grandparents?