1.I’m  _____ if there are UFOs.

   A．sure not      B．not sure    C．not be sure   D．sure that

2.It’s important _________ us _________ English well.

   A．of; learning    B．for; to learn  C．of; to learn.     D．or; learning

3. -- I often have hamburgers for lunch.

  --You’d better not. It’s bad for you ________ too much junk food.

   A.eat      B.to eat     C. eating   D. ate

4.John often helps me _____ English, and he also helps his mother ______ some housework.

   A. with; doing     B. with; do       C. about; do         D. about; doing

5. --- He was born _____ April 5, 1969.

 --- Well, he is forty-five years old. But _____ can’t tell his true age from his looks.

   A. in; anyone     B. on; anyone   C. in, someone    D. on; someone