I learned to skate quickly. At first, I fell down a few times, but now I fall down.
always
often
sometimes
seldom
Your opinion is considered to be _______ great value _______him.
---Will you go with us for an outing on Saturday? --- I’d like to, but I am really busy these days. I can’t _______ a whole weekend.
What did you do _______ the little girl _______ her parents just now?
He realized his mistakes and took action to reduce the loss _______ it was too late.
--The man in a black suit _______ be our youth worker. --- I’m sure it _______ be him. I saw him in the laboratory building some minutes ago.