One of the most important questions they had to consider was__________ of public health
In the US, students can do almost anything they want in class, ____ they don’t make too much noise or disturb others who want to learn from the teacher.
Reaching this agreement so quickly was a great____ for the meeting.
Though having lived abroad for years, many Chinese still _____ the traditional customs.
When such an organised group became too large for its members to travel together comfortably, it would ______.
By the time Jack returned home from England, his son _____from college.