Opening the window, we saw a high mountain__________ us going up into the sky, just like a sky-scraper.
The comments on the film, ______ this is one example, are very sharp.
He _________ English for eight years by the time he graduates from the university next year.
Try to be more careful next time. Carelessness only ______ mistakes.
The great chance he has been looking forward to _______ at last.
When ______ with any difficulty, you should not give up easily.