_________ its low cost, the appeal of iron as a building material layin its strength, its resistance to fire, and its potential to span vastareas.
Honey, stay outside and ______ a few minutes; then we'll go to church together.
-- Why didn't you go camping with us? -- But I ______ all about it!
-- When do you need to pay the balance? -- ______ December 31.
I think ______ information of this kind is help when you look for a job.
25. The doctor recorded the ______ of the old man’s death as heart failure.