He’s never seen to eat so muchfood,______________? —-No, he always eats alittle.

There ______ a dog and two cats in the picture.

I will drive to the station to buy a ticket toBeijing for next Sunday—______ Actually you can order a ticket online

Only when class began ______that he hadleft his book at home．

It was nothing but his ten years of hard work that _______ his success in his research.