What do you think of his suggestion ______ we organize a football club?
---Do you think our basketballers played very well yesterday?----______.
—Do you think you could successfully light the flame at the opening ceremony?—_______. This is not the first time for me.
The father and the son entered the tiger area _______ two doors were open at the time.Suddenly five tigers appeared, one of which killed the father.
Gilbert wasn’t ______ the time this morning, so he was late for school.
We should consider the professor’s advice _______ our school library provide more books on popular science.