THE PLANE TAKES OFF AT THE AIRPORT.的at用对了吗?可以用in代替吗?

Plese what time the plane takes off. Have you_____(查明)when the next plane takes off? when the plane takes off这句话是什么意思 You should turn off your mobile phone when the plane _______.A takes in B takes up C takes off Do you know when the plane takes off?为什么不用将来时when the plane will take off The plane takes off at 8 o'clock The plane will take off at 8 o'clock 都可以吗. The plane takes off at 9.15 in the morning 同义句 The plane （）takes off （）9.15 in the morning the plane takes off at xx time.我概念不清the plane takes off atthe plane take off at主语不是the plane 不是单数吗?那谓语也应该单数 take You should get to the a____ before the plane takes off. The plane takes off at 7:00,____ it?A.does notB.didC.isD.is not i think the plane takes off at seven,but you'd better phone to (确认) Don't somke until the plane takes off 这句主语是什么? 单项选择：ladies and gentlemen ,please fasten your seatbelts.the plane() A takes off ...单项选择：ladies and gentlemen ,please fasten your seatbelts.the plane() A takes off B is taking off C has taken off Dtook Do you know _____?A.when the plane takes offB.when does the plane take offC.when will the plane take off Wheels will go inside the plane when it ____.A.lands B.takes off C.puts on D.puts off 英语句子时态问题.the plane will take off at 9:00the plane takes off at 9:00这两个句子都对吗。 The plane takes off at 8 o'clock The plane will take off at 8 o'clock 都可以吗.都可表达同一种意思 Ladies and gentlemen,please fasten your seat belts.The plane( )A.takes off B.is taking off c.hastaken off D.took off