A tropical storm is building strength some distance from your ship. Waves are coming from the east，with periods increasing from 5 seconds to 15 seconds. The swell is from the east. Where was the storm when these new swells were generated? （）

【参考范例二】Animals or Pets What is your favourite animal?

What is famous about your hometown?

When your vessel is on or near the path of an approaching tropical storm the（）.

Which condition suggests that your present position lies in the navigable semicircle of a tropical storm（）.

A tropical cyclone has recurved and entered temperate latitudes. In the Northern Hemisphere when a large high pressure system lies north of the storm，what situation may occur?（）

Which change in the condition of the seas could indicate the formation of a tropical storm or hurricane several hundred miles from your location? （）

You have determined that you are in the right semicircle of a tropical cyclone in the Northern Hemisphere.What action should you take to avoid the storm（）.

Sometimes a tropical storm moves so slowly that a vessel，if astern of it，can（）it.

If you do not know the subject, you will not understand what is said or written, even if English is your mother （） what is said or written.

（）generally indicates that a gale or storm is approaching.

热带风暴（Tropical Storm，简写（））。