The survivor said it was because of his strong determination _____ he survived the earthquake
Babies’ health is much more likely to be affected if______ parent smokes.
The continuous rain ______ the harvesting of the wheat crop by two months.
--Do you think you will give me a hand in time of trouble? --I’d like to do something for you ______ everything you’ve done for me.
The bus hit against a tree in the fog and ______to the deep valley,with ten passengers killed and twenty wounded.
______in a science competition, the three students were awarded scholarships totaling $ 21, 000.