e anything wrong, Bob You look sad—Oh,nothing muchIn fact, I____ of my friends back home

______ asked to help me with my lessons, he always refused, saying he was too busy.

When asked to explain _____ he does to make his students so fascinated with his lessons, the teacher paused and thought deeply. [ ]

Compare some recent work with your old stuff ______ you’ll see how much you’ve improved

If nobody ____ the traffic rule, the Chinese style ofcrossing the road ____.