Failure to face up to painful experience can be ______ form of stress itself, and can increase ______ possibility of illness.
Whitney Houston’s sudden death suggests that drug abuse is such a serious problem ______ we should deal with properly.
The argument is extremely heated ______ there are necessary conditions of existence such as water on the Mars.
In my home breakfast ______ at 7 o’clock, which has ______ unchanged for 20 years.
— It seems that you are familiar with this city.— I ______ English in a high school here for three years. It' s great to be back!
Money is a needful and precious thing, and when ______, a noble thing, but I never want you to think it is the first or only prize to strive for.