Learning a foreign language calls for your memory, time, patience and emotions.____, it is not a simple thing.
--I'm sorry I made a mistake! --Nobody is perfect.
I want to tell you is the deep love and respect I have for my parents.
If he had spent more time practicing speaking English before, he _____ able to speak it much better now.
The water supply has been cut off temporarily because the workers ____ one of the main pipes.
At our factory there are a few machines similar to _______ described in this magazine.