ights______ because of the air traffic control, the passengers had to wait in the hall.

－_____ leave at the end of this month－I don’t think you should do that until _____ another job.

ren believe they can succeed, they will never becometotally independent．

For most people, it’s very difficult to _____ air on the top of Qomolangma.

Helen has got _____ it takes to be a great tennis player. In other words, she has the potential to become world famous.