专项练习
1．Ford tried dividing the labor，each worker_a separate task．
A．assigning B．assigned C．was assigned D．would be assigned
2．The lecture_，he left his seat so quietly that no one complained that his leaving disturbed the speaker．
A．began B．beginning C．having begun D．being beginning
3．Such_the case ，there are no grounds to justify your complaints．
A．being B．is C．was D．to be
4．Darkness_ in，the young people lingered on merrymaking．
A．set B．setting C．has set D．was set
5．With all factors_，we think this program may excel all the others in achieving the goal．
A．being considered B．considering C．considered D．are considered
6．A new technique_，the yields as a whole increased by 20 percent．
A．to have been worked out B．having worked out C．working out D．having been worked out
7．On the top was the clear outline of a great wolf sitting still，ears ，alert，listening．
A．pointed B．pointing C．are pointed D．are pointing
8．Walter offered us a lift when he was leaving the office ，but our work_，we declined the offer．
A．not being finished B．not having finished C．had not been finished D．was not finished
9．There are various kinds of metals ，each its own properties．
A．has B．had C．to have D．having
10．The article opens and closes with descriptions of two news reports，each_one major point in contrast with the other．
A．makes B．made C．is to make D．making
Key：1—5 BCABC 6—10 DAADD
