__________ entered the office when he realized that he had forgotten his report.
Can you show me a case this phrase is often misused by Chinese students, Mr. Brown?
—What on earth makes you apply for the position as a guide? —This is the job that I .
The students entered the classroom,smiling and________,and ______ down to have their lessons.
He kept a little notebook, in which the names and addresses of his friends.
that her mother would come back soon, the girl calmed down.