问题补充：
---It won’t take long to clean our school if all the students are willing to help.
---Yes, I think so. .
A. Too many cooks spoil the broth
B. Don’t put all your eggs in one basket
C. Many hands make light work
D. Every dog has its day
答案：
A. Too many cooks spoil the broth
B. Don’t put all your eggs in one basket
(答案→)C. Many hands make light work
D. Every dog has its day
解析：Too many cooks spoil the broth人多反误事；Don’t put all your eggs in one basket不要把所有鸡蛋放在一个篮子里；Many hands make light work人多力量大；Every dog has its day是人都有得意时。根据上文，如果所有的学生都愿意帮忙的话，打扫我们的校园不会用太长时间。——是的，我这样认为。结合语境可知选C。
