Learning a foreign language calls for your memory, time, patience and emotions.____, it is not a simple thing.
Now the question that you must carefully consider is _____ can be put into practice.
The order is that all the goods _____ to the city on time.
Mark often attempts to escape _____ whenever he breaks traffic regulations.
It was 1969 _____ the American astronauts succeeded in landing on the moon.
----I can’t see the words on the blackboard clearly. ----Why, your eyes need _____. Perhaps you need ______ glasses.