My little brother was born ______ 2000. [ ]

I will send you an e-mail as soon as I ______ in Canada. 　　[ ]

What’s _______name?—Betty. She is my friend.

Do you know the man ________ visited the United States in February? –Yes. He is Chinese Vice-President Xi Jinping. He said it was his _______ visit to the United States.

There are ________ of students in our school, but only ______ are girls.