—I heard the peasants here        very poor in the past.—Yes,but there        great changes in the past few years.

I am tired. I ______ all day.

My brother wants to work in the factory which _________ now.

— I will come to attend your lecture at 10:00 tomorrow. — I’m sorry, by then my lecture will have ended and I _____ in my office.

 — Beijing is well worth visiting. I _____ there with my parents during the holidays.— I agree. I have been there twice.