It’s time________ lessons. But Lily isn’t in the classroom.
---What will you do if it _____ rain tomorrow? --- I’m not sure.
They found difficult to finish the work in such a short time.
--The factory wants to make more cars with _____money.--I think it's impossible.
-- You look_____. Why? --I lost my ID card.
I met Li Lei_____ hospital last Sunday. He was ill_____ hospital then.