As a grassroots singer, she reads everything she can get hold of and catch every opportunity she meets up with so as to gain _____ progress.
Children are always ______, and usually think differently from adults.
I’m sure you ______ to us just now, because we already know the truth.
I have many friends, __________some are businessmen。A of them B of whose C of which D of whom
He had been ill for a long time and _________ he was left behind in his work。
It was impossible to avoid _____ by his opinion。