___________ are you? —I’m twelve. [ ]

Do you know _______ young man under the tree?—-Yes, but only a little, maybe he is _______ university student.

Alex, how long ____________ you ___________ in this school?–For three years. I’ll graduate in July.

Let’s talk __________ the weather.—OK.[ ]

Do you prefer spring ________ summer?―________, because it’s warm and flowers start to come out．