You were my _________when I was weak; you were my voice when I couldn’t speak.
--- I think he is taking an active part in social work. --- I agree with you _________.
By the time he was seven he had learned _____ 2000 English words.
We are too small to compete _____ a company like that.
Hey, John! I _____ that you were invited to this party too.
It was at school _____ he had studied _______ we met him last night.