There are _________of nurses in our school but only _______of them are boys.

Have you finished your work yet? —No，I’ll finish it in _______ ten minutes.

This box is too heavy.—Well, we have got some ________ ones. They’re over there, on the desk.

After that, he knew he could _______ any emergency by doing what he could to the best of his ability.

_____ hours do you exercise every day? [ ]