Mr. Edward was not in, so his brother acted as （）at the party.

Nobody knows how long and how seriously the shakiness（不穩(wěn)定） of big businesses will （） down the economy.

He（）for military service against the wishes of his parents.

She had clearly no（）of doing any work, although she was very well paid.

Many students found the book （）;it provided them with a large amount of information on the subject.