________ is no doubt _______ Mo Yan, this year’s Nobel Prize winner in Literature, ever did so much on his way to success.

John likes walking in the open air on weekends, _______. [ ]

__________ people are there in your family?-There are five.[ ]

Would you come to my house for dinner Sunday night? —_______,but I’ll be dining with my grandparents.

What’s _____most useful invention in the 20th century? —_____ computer, I think.