We go to school _______7:30_______the morning .A、in/at B、in/in C、 at/in
_________have a try again? I’m sure you can do it.
I think we all need to help animals live __________.
Everyone __________go through the security check(安检) when entering the Bird’s Nest stadium.
I was drawing a horse when Jim __________to my house.
Please __________your mobile phone when you are having a meeting.