There are many trees on ________ sides of the road.

—Don't be angry with your kid when he makes a mistake again, will you? —No. I won't. I know that ______of us are perfect after all.

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

—I’m Bob. What’s your name?—Mary. How are you?

---_________milk would you like?---Half a kilo.