How do your parents usually go to work?—My mother usually goes to work _________ bus while my father ________ a bike to work.

There is no doubt _______ my friend is not satisfied with what they have done.

He kept a little notebook, in which__________ the names and addresses of his friends.

It ＿＿ me three hours to do my homework yesterday.

Don’t _____ your hands from the window when you are on a bus.