¶þ¡¢µ¥ÏîÑ¡Ôñ£¬15Ì⣬ÿÌâ1·Ö£¬¹²15·Ö)
( )21. ---What is Cindy doing now?
--- She is writing e-mail on Internet .
A. a;an B. an;a C. an;the D. the;an
( )22. Please keep it in that you must take the keys with you when you
go out.
A.body B. head C. mind D.mouth