He was almost asleep, ____ with all this hard work.
A、worndownB
【句意】他干了这么多重活儿，累得精疲力竭，差不多睡着了。
【难点】wearout意为“使疲乏;使厌倦;使耗尽”;weardown意为“使消瘦，使厌烦”;wearoff意为“渐渐减少;消逝”;wearaway意为“消磨，打发，虚度;(时光等)流逝”。
Thelittleboydidn’tknow_______.
—Do you mind__________ here?
—________.
Physics is the present day equivalent of ____ used to be called natural philosophy, from ____ most of present day science arose.
Perhaps the customer has ____ his monthly statement and not paid the bill.
______ hard work it is!
