After he returned,he denied___in his luggage one hour before the flight and he didn’t go there by air
—Growing population resulted in growing rubbish.—There is ______that rubbish will become the major threat to human beings in future.
—Happy birthday to you! — ______.
— Have you read this book?— Yes. But that one is ________ worth reading.
Maybe you have been to many countries, but nowhere else ___ such a beautiful palace.
—How are you getting on with your business? —I'm glad to say it is ________.