We begin to move restlessly about if we feel time is slipping away without some return-be this in terms of pleasure, work value, or rest.
A、 ..not knowing whether we will be rewarded with regard to pleasure, work or rest.
B、 .not knowing whether we are getting anywhere in amusement, achievement or relaxation.
C、 .. without getting paid for what we have done-doing something enjoyable, useful or just relaxing.
D、 .. without achieving anything-doing something we enjoy, or getting something done,or simply relaxing.
【正确答案】：D
