_______ it’s hard work, _________ I enjoy it.

nce a year by fire officials, whether a school is large of small, is a regulation that must be carried out in this country.

依次填入下列各句横线处的成语，最恰当的一组是（ ）①他总是在背后议论人，这虽然证明他的涵养还未达到 ，但总比那些人前说好话背后说坏话、两面三刀的人要好上许多。②在那荒唐而又可怕的十年间，说谎的艺术发展到了 的地步，谎言变成了真理，说真话倒犯了大罪。【来源：】③读书要有心，有心者能在作品中找到适合自己的修炼方法，持之以恒，学识就会由此 ，必将收到意想不到的效果。

Mr. Liu is our new head teacher this term and he wants to know _______.

The camel comes from Africa. It’s African.It lives in the ________.