This book ______ 50 maps, _______ 20 of America’s.
Try to _____ the children down. They’re too excited.
I am very grateful for your assistance, and hope that one day 1 may be able to do something for you__________.
--- How are you _______ with your study at present?--- very well.
We should not _______ small mistakes, or they might lead to big accidents.
—Her father is very rich.—_______ She wouldn’t accept his help even if it were offered.