“in a second”what does it mean?

“in a second”what does it mean? in a sprit second My homework is done.What do we do ( A.last B.first C.next D.second A man ran 900 meters in 2 minutes.What was his speed in meters per second? What do you have in a bag what to do in a storm作文 what do you play a part in What day is the second day in a week?怎么回答啊 what will be the effects of a second disneyland in this country作文 What do you want to do in a party?改错 what do workers do in a clock factory what do you do in a field trip? She has never been to Canada,______?[A]A.has she B.hasn't she C.is she D.did sheEnglish __ in Chine as a second language.[B]A.speaks B.is spoken C.speak D.spokenI don't know ____.[C]A.what to do it B.how to do C.when to do D.hoe to do itYesterday my Do you know the man____ a blue uniform ____the second photo A.wear,in B.wearing ,in为什么? Knowing what do in case of fire isimportant.If a fire broke out in your home,what would you do?First,you should warn everyone in the hourse about the danger.Dont panic or start crying.Be calm and fast.Second,you and all the others should get out of t You are participating in a race.You overtake the second place person.What position are you in? We will have to do it---timeA:the second B:second C:a second D:two~ 1.What did you do with your car?--I lost my key .so I had to 〔 〕in a park.A.leave B.take C.pull D.push2.What do you think ie the second ( )invention of all the inventions?A.useful B.more useful C.much useful D.most useful3.Five hundred dollars (