I didn’t know when he     back. He said he would call me when he     home.

 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.

Is the hotel         offered you a job         _____ you stayed the first time you arrived here?

After entering university, we will reach a point in our studies       _________we need to decide how to arrange our timetable efficiently and independently. 

I’ll never forget the days ______ I spent on the farm.