20．—I got up at five this morning, I thought it was Friday． —You _____ so early．It is Sunday today; you don’t have to go to work．

Will you be able to come to our school tomorrow — _____.

They at home when a storm came

With the living environment becoming worse and worse, many of the earth’s species are ______.

I’d rather have a room of my own, however small it is, than _____a room with others.