Alice was playing in the park while I __________my homework at home.
A. do B. did C. am doing D. was doing
—Chris, could you help me __________my dog while I'm on holiday?
—Sure. I'll take good care of it.
A. think about B. ask for
C. look for D. look after
_________have a try again? I’m sure you can do it.
A. Why not B. How about
C. What about D. Why don’t
I think we all need to help animals live __________.
A. in time B. in danger C. in peace D. in trouble
Everyone __________go through the security check（安检） when entering the Bird’s Nest stadium.
A. can B. may C. must D. might
I was drawing a horse when Jim __________to my house.
A. comes B. came C. is coming D. was coming
