—Growing population resulted in growing rubbish.—There is ______that rubbish will become the major threat to human beings in future.

My friend came to school _________,I told him I ______about her.

She doesn’t speak ____ her friend, but her written work is excellent.

After a whole day’s hard work in the field, the old peasant went home, _____. 

In recent years travel companies have succeeded in selling us the idea that the further we go, ______.