My father asked me to go on ______ walking tour, but I don’t think I’ve got ______ energy.
Doctors are doing research to find out what happens physically when people ______ smoking.
If you are feeling so tired , perhaps a little sleep would ______.
—May I have a word with you? —________.I’m not busy, anyway.
The experts suggested the problem worth paying attention ____ at the meeting.
According to a recent research, many teenagers have no dreams to lead a comfortable life.