. It is difficult for us to learn a lesson in life __________ we’ve actually had that lesson.

My brother，______ his classmatesoften made fun a few years ago，is now studying in England．

I ________ asleep because it took me a long time to realize that the telephone was ringing.　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

I’m dead tired. I can’t walk any further, Jenny. —-_______, Tommy. You can do it.

I requested that you the task on time.