It’s funny that Howard___ speak to you like your boss. 

It is recommended that the project ________ not be started until all the preparations have been made.

Without gravity, we _____ walk on the ground as freely as we do now. 

-- May I go out now. Dad? -- No. You __    let your mother know first.

 —Is Jack on duty today? —It_____ be him. It’s his turn tomorrow.