We may find that learning a foreign language does not have to be ______learning our mother tongue, but can in fact be as easy.

Every year lots of trees ________ to make our countrymore beautiful.

Please don’t bother me again. I’ll inform you of the details at an _____ time if you must know.[ ]

Would you like milk or juice— _________ is OK. I don’t mind.

Her mother doesn’t ________of her going to study in the United States alone.[ ]