In class, fewer of the students who are not ___ their studies sometimes ____the dying robots, not listening attentively.
To achieve your goal,yourself and your direction the most important thing.
Scientists ______ thousands of chemicals before they decided on the right one in the end.
What Mr. White said sounds ______ .
It's obvious that the experiment ______ a great success.
To their great ______ , Tom's problem proved not to be as serious as they had feared.