We hadn’t planned to meet. We met _________ chance.
The question _____ at tomorrow’s meeting is of great importance.
is known to us all, Germany is ______ European country.
The club welcome all new members ________ age.
The nutrients in ________ falls into the ocean quickly become available to other living things.
AIDs is a disease that _______ the body”s immune system. A breaks out B. breaks into C. breaks down D. breaks up