Jim’s father was born _________ July 10th, 1981. So tomorrow is his birthday.A. in B. on C. at
It will take me two weeks ________ the work.
—How often does your brother go swimming? —________.
I can’t learn math well. Can you give me some ________?
They are going to have a picnic _______ next week.
There are about ________ students in our school.