Theothertimingsystembelongsinourinternalclocks，which，left________，wouldtiethebodytoa25-hourrhythm.
A、behindB
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”。
Lying under the skull, the human brain contains an average of ten billion nerve cells called ______.
Modern English words man, woman, child, eat, fight, etc, originate from ______.
Werefertothelimitedrangeofsoundsasthephonicmediumoflanguageandindividualsoundswithinthatrangeas______.
He said that the group ________ him a letter and asked him to go there for an interview.
Acompoundisthecombinationofonlytwowords.
