The girl, when _____ why she _____ in the exam, just lowered her head and kept silent.
This book is said to be a special one, which ___________ many events not found in other history books.
He is only too ready to help others, seldom, ____, refusing them when they turn to him.
I think the doctor is able to care of _____ is the matter with your son .
Let us not waste ______ time we have left .
Do you consider it any good _____ the truck again ?