Paul has friends except me, and sometimes he feels lonely.

When were you born?—I was born __ January ,1987.[ ]

Linda’s teacher was so mad _____ her because she made lots of mistakes in the test. [ ]

I have to buy _________of the two books because I don’t know which to choose.

Must I hand in my exercise book now, Mr. Zhao?—No, you ______. You may give it to me tomorrow.