It is useful to be able to predict the extent _____ a price change will affect supply and demand.
His wife, to whom he _____ for 20 years, died of cancer last Thursday.
His mother suggested he ______ to see the doctor, because his pale face suggested he ____ ill.
His physical disability makes _____ rather difficult for him to find a good job.
After some time in the dark cave, our eyes slowly _____ the dark.
---Did the little boy manage _____ the suitcase upstairs? ---No, he didn’t. He isn’t strong enough even ______ it.