20. _________raining hard for 3 hourswithout stopping.21.

He offered to her a hand as the suitcase was too heavy for her to carry.

Does the newly published detective book sell well? —No．it will only a limited public．

Now I can’t find ______book about animals. —Is it ______ old picture bookon the desk?

Whydon’t you have a notebook with you —I’ve_________it at home.