How about your travel? — You can hardly imagine what difficulty we have had ______ the vast desert. [ ]

enjoy learning English , _______it takes me a lot of time.

She __________ an English teacher, but now she is a businesswoman .

Some adjustments have to be made to the timetable so that it can ______everybody that is concerned.[ ]

0;you want to see the chairman of the department, you’d better make an _______ with his secretary first.