Could I use your computer, Susan? —Sorry, I’m going to _______ it now. You can use it tomorrow.

The building ______ stone and each stone ______ more than two tons (吨).[ ]

______ does your brother go online?—Three times a week.[ ]

When he was a little boy，he ______ on the farm.

Wang Fang rushed______Mr Sun’s house and helped him out. [ ]