------- we are going there by _____ sea.------ Don’t you think it too slow? Why not take ______train?
China has hundreds of islands, ___________ is Taiwan Island.
You must have waited here for a long time ,___________you?
Nearly________ of the surface of our planet is covered by water.
It's said that __________ is going to give us a lecture.
----Would you please lend me the dictionary? ---- ____.