—You seem to be familiar with this city．—I       here for three years．It's great to be back．

 No one _______ the building without the permission of the policeman.

----I _________ the book for a whole hour . ---- No wonder you look so tired .

Tens of us had bread for supper, while the rest ____.

    -- How can I apply for an online course? -- Just fill out this form and we _______ what we can do four you.