The teacher told the student to go back ________ he sat.
Where was it ______ you _______ our maths teacher?
----- Mary looks very upset. She _______ failed to pass the exam. ----- I guess so. It's very difficult after all.
— When could you have a meal with me? — I'd like to go ___ it is convenient to you.
— Who are you going to have _______ this letter for you?— My secretary.
Not others but Mother always _____ children ______ in their beautiful clothes.