Besides wildlife on land, there are species living in the oceans _______ we still know little.
The movie once________a whole generation of people.It proved to be of much________in the education of people.
—You look so worried.What’s the matter? —I don’t know________these boring problems.
—May I have some more coffee,please? —I’m sorry,but there doesn’t seem to be________.
I agree with most of what you said,but I don’t agree with________.
We must keep a positive attitude toward the future______we may encounter some difficulties.