I told your friends how to get to the hotel, but perhaps I ____have driven her there.

—What does "___________" mean?—That means, the things that people do mean more than what they say.

.The report shows that global climate change__________the drought in Southwest of China but ______ we need to make greater efforts.

There were signs here and there, _____ visitors to look out for ______ rocks.

Some people who don’t like to talk much are not necessarily shy；they ______ just be quiet people.