请大家帮我看一下这一道选择题,谢谢

He______do the cooling because he has an hourly worker______the homework.

A. needs to; do
B: needn't; to do
C: doesn't need to; do
D: need; to do.

应该选C
首先,从意思上看,前句应为否定,所以即可排除A和D
其次,need作为一般动词时,应为dosen't need to do sth,而作为情态动词时,应为needn't do sth,这样看来,B和C的前句都没有错. 但后句应该是have sb do sth,而不是have sb to do sth
综合上述,只有C是正确的.

谢谢!现在清楚了..