Mr. Bush is on time for everything. How ____ it be that he was late for the opening ceremony ?
Oh, dear. I forgot the two _________.
She has been in Tianjin for ten years. Tianjin has become her second _________.
________ mothers couldn’t go to the meeting, because they have gone to Shanghai .
Li Lei has been to __________ many times this month.
He is a success as a leader but he hasn’t ________ in teaching.