I think the time you ________________ surfing the Internet every week is too much.

Obviously, ______ no one wants to be alone all the time, everyone needs some degree of privacy.[ ]

－Where did you put the car keys? －Oh, I ______ I put them on the chair because the phone rang as I ______ in.

We only live once, but if we live a wonderful life, once is enough.— ________ I agree.

I was late for school this morning, because the bus was too _________ for me to get on.