Thanks to the advice _______ by the experts, we finished our task at an amazing speed.
Such a grammar mistake is __________ among the beginners of English study.
A person's __________ body temperature is about 37℃.
The program, __________ at improving the students' ability of listening and speaking, will surely be a success.
He didn't answer, with his gun __________ at David.
Teachers are now aware of the difficulty that some students have __________ attention.