1.       I don’t think it is ______taking the trouble to explain the question to him.

A. worth             B. worthy            C. worth of           D. worthwhile

2. You’d better ______ your behaviors in public places, or you are likely to get a ticket.

A. watch            B. see                C. observe          D. notice

3. With courage and determination, she set out to _____ her childhood dream: to become a world famous actress. Which of the following is NOT OK?

A. realize            B. achieve            C. come true         D. live