We'd better get up earlier than usual if we want to catch the train, ______?

Bob had little idea that his wife was in danger, _____?

---__________does your friend go roller skating? ---About once a week.

—Excuse me, ________ is the library from here?—It’s about 5 minutes’ walk.

 – Can’t you spell this word? – ________. I am sorry. I am not good at English.