汶川地震是人类遭遇的又一次灾难与挫折,导致这一挫折的因素是
I have ________ French. What about you?
I ________ with my grandma because my parents have gone abroad for further study.
How can they learn much ________ they spend so much time playing computer games?
Cars do cause us some health problems, in fact, far more serious ________ than mobile phones do.
After ________, the litter girl was depressed and kept silent all the day.