your composition carefully, some spelling mistakes can be avoided.

After working until midnight for two weeks, he finally ________ and had to stay in the hospital.

While ________ to foreigners，you must try your best to make yourself ________.

Over the past decades, the population in this countrybecause of the rising birth rate, immigration and the declining death rate

I can’t believe it! ________ a little boy knows________ much about space.