For most people, it’s very difficult to _____ air on the top of Qomolangma.
Detective Lu said the murder probably happened________ .
— Oh, I have an examination to take next week! —______
---A number of volunteers ____ willing to work in poor areas in the western part of China. ---Yes, the number is getting ________.
Is there anything __________ to you?
There is _______ with your computer. Why not have it _______?