阅读下面短文，根据上下文，从文后方框内选出适当的选项填入文中空白处，使短文内容正确完整，然后完成第5小题。Su...

1．  Bring some needed medicines in your carry-on bag．

2．  Don’t leave your seat during the plane’s take offs and landings．

3．  To prevent blood clots(血流不畅)：

★1                                

★Do leg-stretching(伸) exercises in your seat．

★Wear comfortable clothes．

4．If you sometimes get airsick：

★2                               

★Keep your seat belt fastened(系好安全带)．

★Don’t take small planes．

5．3                        Don’t take wine or alcohol(酒) ．

6．Use both hands when reaching overhead for something．4                         

A．This will help prevent yourself from getting hurt．

B．Better drink water or juice when you feel thirsty．

C．Get up and walk around every 60 to 90 minutes．

D．Ask for a window seat or a seat over the wing．