David said that it was______ his strong interest in literature_____ he chose the course.
A lunar probe-Chang’e-2_______ as much as 2 tons was sent up into space on October12010.
------What will you do during the coming winter vocation?------ I don’t know, but it’s about time ______ something.
As the crowd rushed towards the gate, several people got______.
_______, he doesn’t study well.
I invited five people to my party. Out of five people, only Tom and Jack can come. ______ people can’ t come.