When you ______ a difficult task, try to continue with it and finish it.
I find _______difficult to get to sleep because the man upstairs made much noise.
--- You look ______,Paul. What’s the matter?--- I’m having trouble ______ math.
-- I don’t know ______ with this problem. It’s too hard. --- You can ask Mr Wang for help.
I used to go to sleep ________ my bedroom light ________.
—There is ____ time. You don’t need to hurry.—But I want to see her as early as possible.