My students asked me _____ I would go to Beijing by air the next year.
The headmaster wants to have the opening speech ________ by our math teacher next month.
It was ________ the trouble to explain a job fully to new employees.
He argued _______ smoking, and insisted that it was ________ argument that smoking was harmful to health.
-----Poor Steve! I could hardly recognize him just now! ------_______________. He has changed so much.
The little girl who got lost decided to remain _________she was and wait for her mother.