Scientists think they have in their attempt to find the causes of some major diseases A broken through B worked though C got thought D gone though
Mr. Johnson ______ his boss ______ his careless mistake.
---What do you think made Celia so happy?--- ______ a prize in the recent competition.
Our school has a library and it ______ more than one million books.
---Good evening. ______ ? ---Yes, that’s right. We’d like a table on the side.
______ different life today is from ______ it was fifty years ago.