No matter where he is, he makes _____a rule to go for a walk before breakfast.

I couldn’t help ______if the bus was late.

My grandma still treats me like a child. She can’t imagine ______ grown up. 

With the rapid development of the Internet, _______ communication is done by regular mail.

 — Are you expecting to receive a digital camera as a gift?— Yeah! I can’t wait to get       .