I will try my best to stop my son from _____ the same mistake.
— It must be Jim singing next door. — It be him. He has already gone to Shanghai on holiday.
They are going to have a picnic ______next week.
----Do you mind my taking the seat? -----_____ It’s for a sir named Jack.
-What do you think of my answer to the questions? -Sorry. What’s that? I______ about something else.
How long have you_________?