问题
选择题
We needn't spend much energy _________others ________ . [ ]
A. to make; happy
B. to make; happily
C. making; happy
D. making; happily
答案
答案:C
We needn't spend much energy _________others ________ . [ ]
A. to make; happy
B. to make; happily
C. making; happy
D. making; happily
答案:C