It is clear that the whole world is passing through a social revolution in which a central _____ must be taken by scientists and technologists.
The little boy came riding full speed down the motorway on his bicycle. _______it was !(2007上海,32)
(09四川卷)11. — I wonder ________ you’ll water this kind of flower. ——Every other day.
(09陕西卷)16. He must be helping the old man to water the flowers, ?
(09辽宁)34. It’s the first time that he has been to Australia, ?
(09湖南卷)32. You and I could hardly work together, ?