Could you help me clean the floor， Bob？
Wait a moment，I _____ for some information about the World Cup．（ ）
A．searchB．have searched
C．am searchingD．was searching
The last BeiDou navigation satellite （北斗卫星导航） successfully last month．（ ）
A．was sent upB．sent up
C．has sent up
On the phone her father asked her then．（ ）
A．what was she doingB．what she was doing
C．when she was doing
That be Mary． She has gone to Changsha on business． （ ）
A．can'tB．mustC．may
wonderful the movie is! I want to see it again． （ ）
A．HowB．WhatC．What a
This is your schoolbag． But I can't find_____．（ ）
A．meB．myC．mine