Mr.Smith was_________ to be a doctor but he became a teacher when he grew up.
If you forget ______ your watch, it is likely to stop soon.
Not only ______ to look after her children, but also _____ to work.
---What about my idea?---Very good! But not all people _______ the idea that money can bring everything.
A completely new situation will______ when a new tool comes into use.
The large family is really a heavy_______ on his shoulder, so he has to work day and night.