Where is Bob? I cannot find him anywhere.— He ________ have been off long. I heard him make a call just now.[ ]

___________ is it from the hotel It is about 40 minutes ___________.

It will be about 100 days __________the College Enhance Examination comes

When they moved to Canada, the children____ to the change very well.[ ]

The number of the workers in this factory ________1,500. A number of them ______ from the countryside.