The conference has been held to discuss the effects of tourism _______ the wildlife in the area.
Perseverance is a kind of quality and that’s __________it takes to do anything well.
__________ we’ll go camping tomorrow depends on the weather.
—I think it is going to be a big problem.—Yes,it could be.—I wonder__________we can do about it.
In the after-class activities,the students had plenty of_________ and gained a lot of practical _________.
She is American,__________she knows little about American history.