ms_______ to our modern world, where everything is a rush and we try to cram as much into every minute as possible, but if not busy, we feel unproductive and lazy.

The play is seldom put on here,is it?—_________.Only once three weeks ago.

What happened________the old man last night—He got lost and couldn’t find the way home．

There is a natural phenomenon scientists call the greenhouse effect.

－Won’tyou like to come to Li lei’s birthday party－I willif I ______