How far away is it from here to yourschool——It’s about ________

Once out of the earth’s gravity, the astronaut is____by the problem of weightlessness.

Is that _________ schoolbag—No, it isn’t．It’s _______．

or the fact that Mr Smith ________ill yesterday, he would have attended the important meeting.

For the sake of enough time for study and rest, students are _____ from using cellphones in our school.