The speech by the mayor of Shanghai before the final voting for EXPO 2010 is strongly impressed ___ my memory.
It is ten years since we ________ each other last time.
More wild tigers have been seen in the forest around this area, ________ there used to be very few.
It is usually warm in my hometown in March, but it ________ be rather cold sometimes.
You can never be ________ when crossing the street.
________, you need to give all you have and try your best.