When you ride a plane, a boat or even a car, have you ever felt dizzy and wanted to vomit? How about driving to Mae Hong Son, and negotiating the thousands of twists and curves on the mountainous road, or experiencing rough waters off the coast of Pattaya on a boat, or may be a flight somewhere through air turbulence. If you have, then you will know what that unpleasant sinking feeling is. It is travel sickness! Many people, especially young children, become sick if they travel any distance in cars or other means of transportation.
Travel sickness can be best prevented by keeping the windows open while sitting in a car. You can also sit beside the driver in the front seat. Try to avoid reading in a moving vehicle. It is better to have only a light meal before going on a long trip. If you take medicine for travel sickness, it should be taken well before setting out on your journey.
Sweets and drinks also help. Many people, grown-ups as well as children, become sick as soon as go on board ships or airplanes. On a ship, it is best to remain on deck in the open air, though some people prefer to lie down with a hot water bottle.
The underlined word "dizzy" means _________.
feeling unable to balance
cannot see clearly
feel sleepy
get lost