－If I’m not mistaken, your birthday is coming up. Has your brother sent you anything?－Not yet. He never forgets, _________.

 If a person has not had enough sleep, his actions will give him ___ during the day.

I don’t mind picking up your things from the store. ______, the walk will do me good.

On foggy days, you have to drive very ________ on the expressway to avoid traffic accidents.

---- Do you think it's a good idea to make friends with your students? ---- _____ , I do．I think it's a great idea．