Follow your teacher’s advice, _______ you’ll make great progress in your English.

How come a simple meal like this costs so much?— We have _______ in your bill the cost of the teapot you broke just now.[ ]

Can you give me the right answer? —— Sorry, I＿＿＿＿.Would you repeat that question?

He likes playing tricks on others, but ________ , he is a good boy because he is willing to help others.

My pen friend and I keep in touch ________ sending e-mails often[ ]