Theothertimingsystembelongsinourinternalclocks，which，left________，wouldtiethebodytoa25-hourrhythm.
B
译文：更不用说，另一个定时系统在我们的人体时钟内，它会使人保持在一个 25 小时的生理节奏上。此题考查关于 leave 的短语。 leave behind意为“留下， 放弃”，leave alone 意为“更不用说” 。 leave out 意为“遗漏，忽视”。
_______ is a fact that English is being accepted as an international language.
I don ’t mind _______ the decision as long as it is not too late.
We refer to the limited range of sounds as the phonic medium of language and individual sounds within that range as ______.
This is an important problem _______ too few social scientists have researched.