______ well, you need to have a good sense of balance.
. –Did you see ____ English teacher? --I saw him at ____ work in the office just now.
. When ____ a new word, you’d better _____ a dictionary.
. After the quarrel, I tried all my best to fix the misunderstanding between us, but all my efforts seemed ______.
. -- Better get down to your work, Jack. --- _____________.
. If you use another method to solve this problem, you’ll probably ______ it.