If you want to have a good mastery of knowledge,you must_______ what you are being taught in class and make immediate use of it.
---Why do you look so upset? ---There are so many troublesome problems _____.
— Alice told me you called yesterday. — Yes, I had a problem with Jane, ___________I thought you could help me with, but you were not in.
_____, and I believe you will realize your dream.
—How long do you think the terrible snow will_____ ? —Sorry, I didn’t listen to the weather forecast.
Most disaster experts believe there is the potential ______ things could get a lot worse.