It is easy for people to ________ the bad habits such as smoking and drinking, which are not so easy to get rid of.
Ten years ago the population of our village was _______ that of theirs.
—You don’t believe in aliens, do you ? —__________. It’s a crazy idea.________
Either you or one of your students ________ to attend the meeting that is due tomorrow.
________, he stopped working to have some snacks.
The airline stewardess (空姐) said to passengers on ______ with a beautiful smile, “welcome _________!”