It was ______ the president's speech that the secretary spent the whole morning at home.
. The man to whom we handed the forms pointed out that they had not been ________ filled in.
. Playing with a cell phone, he suddenly ________ the teacher staring at him.
. She seemed ________ the book before, but she said she had never.
. ________ on the subject for half an hour, Liu Ying suddenly stopped.
. She offered me practical ________ with my research, for which I would appreciate for my whole life.