— You look scared. What happened?

    — Well , I _______ along the street ________ the UFO landed.

   A. was walking ; while              B. is walking ; when

C. was walking ; when                  D. is walking ; while

 –Are you scared of the flight?

     --No, just a little ________.

   A. angry          B. serious       C. anxious         D. calm

–Are you scared of the flight?

--No, just a little ________.

--Are you scared of the flight?

--No, just a little ________.

　 A. angry　　　 　B. serious　　　 C. anxious　　　　 D. calm