Homework____________on time will lead to better grades.A. done B. having done C)) be done D. to
A: having done
B: done
C: be done
D: to have been done
A: having done
B: done
C: be done
D: to have been done
举一反三
- The millions of calculations involved, ____by hand, would have lost all practical value by the time they were finished. A: had they been done B: they had been done C: having been done D: they were done
- Given more attention, the work（） A: had been better done B: will be done better C: was better done D: could have been better done
- The work_______by the time you get there. A: has been done B: had been done C: will have been done D: will be done
- The work（）by the time you get there. A: Awill have been done B: Bwas done C: Chad been done D: Dhas done
- The ratio of the work ______ by the machine to the work _____ on it is called the efficiency of the machine. A: to do ...to do B: doing....doing C: having done ... having done D: done ...done