题目内容：
请根据下面的短文回答第题： Announcement(通知)
Good mornin9，ladies and gentlemen．May I draw your attention(注意)to the book Safety in Flight? You will find the book in the pocket at the back of the seat in front of you and we ask you to read it．You’ll also find a news—paper and you may find it interestin9。For those of you not familiar with this kind of plane，you can smoke on the left-hand side of the passenger cabin(机舱)，once the signs at the front of the cabin have been turned off，and at no time in the toilet at the back of the plane．Wc have a duty-free(免税的)bar OE the plane and cigarettes，beer and mineral water will be on sale during the flight．If you have any questions during the flight，please ask our four hostesses(空姐)．Would you now please fasten(系紧)your seat belts to get ready for take—off? We wish you a pleasant flight! Thank you．
The announcement is made__________． A．during the flight
B．before taking off
C．after taking off
参考答案：
答案解析：