閱讀下面短文，根據上下文，從文後方框內選出適當的選項填入文中空白處，使短文內容正確完整，然後完成第5小題。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(血流不暢)：

★1                                

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

★Wear comfortable clothes．

4．If you sometimes get airsick：

★2                               

★Keep your seat belt fastened(繫好安全帶)．

★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．