Is _______ necessary_______ the workers wear uniforms at work?A. it, for B. this, to C. it, that
---Hello! 458-6777. ---Hello! ______.---Yes, please hold on.
Jim _____ a boy ._______father is a doctor.
--- ______ is that in English? --- It’s a clock.
--- Thank you very much. --- _______.
Is that your _______?