(    ) 1. There is ______ “h” and ______ “u” in the world “house”.

          A. a, an              B. an, a                  C. an, an                 D. a. a

(    ) 2. Which cup do you want?  I want_________green one.

A. the              B./                      C. a                     D. an

(    ) 3. Let us______the old man, OK?

A. help              B. helping                 C. to help                 D. helps