He expressed his hope ____ he would visit China again the next year, and this was the very hope ____ he expressed as soon as he arrived in the country.
His teacher was angry ____ him ____ his being late.
She felt disappointed when she found out they had gone swimming____ her.
We left Xi' an _.___ a very hot summer afternoon.
The teacher is busy ____ correcting papers.
The teacher is busy ____ teaching.