―What were you doing when I called you yesterday afternoon? ―I ________ my homework and I was starting to take a bath.
Mary was only too ready to help others, seldom, ______ refusing them when they turned to her.
Mr. Wang made up his mind to devote all he could ______ his oral English before going abroad.
Influenza HINI is an illness that can result in death unless ______ in time.
MSN, ______ you can chat with your friends, makes communication easy.
Mother's love is true love! She's never stopped loving you ______ you become or you do.